I photographed this bronze cannon at Fort Ticonderoga in the summer of 1988. It looks very similar to the "SNY" gun. I didn't record any markings on it at the time, but I didn't examine any of their cannons in much detail at that time.

Ft. T. also has a larger bronze gun (must be a 9 or 12 pounder,) which is nearly identical in pattern to the "SNY" gun. It is marked on the breech "No. 20 11-2-23." It may have other markings, I will have to look at it in person when the weather improves.

Meanwhile I've asked the fort staff if they have any information in their records.

The importance of all of this is that now it looks like we've identified an early "family" of U.S. bronze field guns. I'll tentatively identify the larger gun of this pattern at Fort Ticonderoga as "?? pounder brass gun, old pattern" pending measurement to determine its caliber. I'll post pictures of the larger Fort Ticonderoga piece as soon as I get the old glossy prints digitized.

If someone has already "been there, done that" as far as tying this family together and describing it, please let me know, I don't want to repeat anyone else's work.