AJ Morse & Son

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AJ Morse & Son In 2016 DESCO Corporation purchased the assets of Morse Diving Inc. DESCO is offering products unde In 1837, Fletcher & Morse Co. A few years later Mr. Andrew J. J.

opened at the corner of Water and Congress Streets in Boston Massachusetts. The company began as a manufacturer of brass goods for the marine industry. Fletcher retired from the firm. Andrew Morse began making diving helmets and air pumps. In 1864 the company name was changed to Andrew J. Morse & Son. Near by in Boston Alfred Hale, manufactured his own dive hats using Morse parts during this time. Morse died in 1881 his son William F. Morse took over. The company expanded into manufacturing valves, fittings, nozzles, and water cannons for firefighting. In 1905 William Morse retired and management of the company was given to his daughter Elizabeth and her husband Mark A. Lawton. They incorporated the company and Inc. was added - Andrew J. Morse & Son Inc. The 1910 Morse catalog lists 221 High Street as the company address. In 1916 Morse and the A Schrader's Son company began manufacture of the US Navy Mark V Diving Helmet. The company was sold in 1939 to William Farrell (owner of McKee Pile Diving Company), who continued to operate it in Boston, incorporated as the Morse Diving Equipment Company in 1940. In 1970 they moved the operation to Hingham Street in Rockland, MA, 20 miles south of Boston. Ken Downey was hired by the company in 1978 as a machinist. In 1985 the US Navy decommissioned the Mark V Diving Helmet. Morse Diving Equipment manufactured its replacement, the Mark XII Surface Supplied Diving System for the Navy. In 1993 the Mark XII was superseded by the Mark 21 Diving Helmet. Morse continued to manufacture the Mark XII as a commercial diving helmet. Ken Downey and his wife Donna purchased the company in 1998. In 2014 Morse was sold to Mr. Watson Roby Holland and shortly there after the company suspended manufacturing operations. Mr. Holland contacted DESCO Corporation to explore having DESCO construct helmets for Morse as the ability of the firm to produce helmets had deteriorated. After careful consideration Mr. Holland determined operation of the company was no longer viable. Morse Diving Incorporated declared bankruptcy in 2015. DESCO Corporation purchased the assets of Morse Diving in January of 2016. DESCO manufactures Morse diving helmets under the A. Morse & Son name. The assets of the company were in poor condition and much work was done to allow construction of new helmets. AJMS helmets are constructed using castings made from original or newly replaced Morse patterns. DESCO is committed to offering authentic A J Morse & Son diving helmets. At the time of its bankruptcy Morse Diving was the 412th oldest business in the United States that was in continuous operation.

6933 update. This week Jared began getting the brails fitted. He and Jim got the ductwork installed. Today I made a patt...
10/23/2026

6933 update. This week Jared began getting the brails fitted. He and Jim got the ductwork installed. Today I made a pattern for the transceiver bracket. i never liked how the bracke we made for 6912 looked. jared will have to fill one hole on the pattern so I can redrill it. The first hole I went to drill was dead in the center of the bracket and the drill walked on me. Thought about leaving it to add to the hand made vibe but it's just wrong. Besides I'm in the home stretch of my 36 year career at DESCO so do I want my legacy to be an off center hole? The lock lever still needs to be installed along with the transceiver mounts. I need to remeber to order side glass for the helmet as the ones set aside were sold to two different customers who need replacements. Jared is working on this helmet in between other projects. The breastplate just needs the nametag to go on.

I have included a couple of photos of 6912, the first MK III helmet we made. Also are two photos of Navy Master Diver John Hopkins diving 6912 in Milwaukee 2018. He was likely the first Navy diver to splash a Mk III in 75 years.

6933 is getteing her ductwork fitted. She needs to wait her turn behind a Mark V build for a customer and Air Hats for s...
10/08/2026

6933 is getteing her ductwork fitted. She needs to wait her turn behind a Mark V build for a customer and Air Hats for stock.

AJMS Three Light helmet  #6904 has been sold and removed from the website. The customer wanted a helmet quickly but they...
09/11/2026

AJMS Three Light helmet #6904 has been sold and removed from the website. The customer wanted a helmet quickly but they also wanted a polished helmet. 6904 was the only helmet we had so we removed the tinning and polished it for them.

Befrore moving it to shipping we took a couple of family photos with the T A Scott Helmet and 1769. 6904 was made in 2017 and was used for display at events and on our commercial jake. There is 162 years between 6904 and the Scott helmet, and 106 years between 6904 and 1769.

Check out this video by Brass Hat Diver on Youtube.
08/31/2026

Check out this video by Brass Hat Diver on Youtube.

"Helmet History" is a new series here on the "Brass Hat Diver" chan...

Last week I was helping out a guy who is working on a later  #3 air pump. While doing research I was looking at photos o...
04/29/2026

Last week I was helping out a guy who is working on a later #3 air pump. While doing research I was looking at photos of a 1A pump at Wisconsin Maritime Museum in Manitowoc WI. His #3 and WMMs have consecutive serial numbers. I noticed that the 1A is missing an oil fitting on the connecting rod cap. Not only does the fitting provide oil access, it holds the rod bolt retaining clip onto the connecting rod. No fun fishing parts out of the bottom of the pump case. I will have to get one up there for them. I'm a member of the museum since 1987 so I have to look out for them a little in diving equipment related matters. I made this one copying one I took off our #2 pump. The fitting is now on our website in the pump parts section, Cat No. M1004 $17.00.

It seems a week doesn't go by where I learn something new about AJ Morse & Son products. A person contacted me about a M...
04/24/2026

It seems a week doesn't go by where I learn something new about AJ Morse & Son products. A person contacted me about a Morse #3 air pump he is working on. In the back and forth with him I found out the #3 pump changed in about 1910. Our model 3 pump #866 is a three-cylinder pump. It has two hand cranks and one flywheel. His pump is in the 1000s built after 1910 and is a two-cylinder pump with two flywheels with handles mounted to them. It is also curious that Morse was making two 3-cylinder pumps in 1904, the #2 and the #3

Last week we made the communication cable block for 6933. Anyone who has done manual lathe work will appreciate the fun ...
04/13/2026

Last week we made the communication cable block for 6933. Anyone who has done manual lathe work will appreciate the fun it is setting up square stock into a four-jaw independent chuck and getting it centered correctly. The first gen comm block came with a stuffing nut and a plug if comms weren't used. This helmet has been in process for a while. it keeps getting sent to the back of the line when customer builds come in. The cable clamp was cut and machined from Brass block, not a casting. She will be pretty when she's done.

Address

2450 S Commerce Drive
New Berlin, WI
53151

Opening Hours

Monday 6am - 2:30pm
Tuesday 6am - 2:30pm
Wednesday 6am - 2:30pm
Thursday 6am - 2:30pm
Friday 6am - 2:30pm

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