This thread has been great. The amount of information obtained is staggering.
Today I received an e-mail from Treena L Holmes Hulings, The Clinton E. Wilder Museum Manager, Irvine PA 16329, (814) 563-7773 or (814) 723-1795.
www.kinzua.net/warrenhistory
The Wilder Museum was founded in 1990 in honor of the founder of the National Forge, and holds many historical artifacts from the company, including a 37mm AT Gun, and a NF&O Instruction Book on the gun. She said they have a large room filled with other historical documents, including contracts, however they don't have the funds/resources to catalog it all.
Cover of the NF&O Instruction Manual.
37mm Gun "in action" on the factory floor. Notice the NF&O Coveralls worn by the crew. It appears there is a Dutch Coat of Arms plaque on the breech shield like our gun. Look behind the "gunners" neck.
37mm Gun and Limber in towing configuration.
Line drawing from manual.
Here are two more pictures of our gun.
Thanks Again for everything that has been found. To the gentleman in Australia, I look forward to seeing and hearing about your gun (and others - we had a 2lb QF made by GM New South Wales). Keep sharing the information.