If it's marked 'Hopkins & Allen Manufacturing Co' is made before 1898. 'Hopkins & Allen Arms Co' is made after 1898 till they stopped making sporting arms in 1915. May also be marked Merwin & Hulbert on the first marking as they were the mfg of that companys goods.
In 1915 H&A started making Mauser rifles for Belgium and lost their shirt doing so. Went bankrupt and Marlin & US Gov't Ordnance Dept. took over the plant to help them produce BARs in 1917. In the early 20's Marlin bought the backrupt H&A Company,,everthing except the building. Marlin owned the H&A name till just after WW2 when they sold that trade name to George Numrich and he used it on his muzzle loaders.
I don't know of any serial number data base on H&A's. The shape of the lever (the downward arc) was the earlier style but that was used till about 1911 or 1912. So that's not much help!
The 932 series was chambered for 32RF short or long cartridge according to the catalog ads.
The companys 1902 catalog lists the 922 and 932 models as costing $5.50. I believe they also made a 938 in 38 center fire (38Colt). Upgraded models with checkered stocks MOdels 2932 (2922) were available. The top of the line was the 3932 and 3922 named the Junior Schuetzen Models. Octagon barrels, Lyman tang sites, Scheutzen butpates, semi scheutzen stocks, etc. The 3922 was in cal 22rf of course but also available in cal 25-20Single Shot caliber.
Nice little rifles. I have a 3922 and have had a couple of the 922's. Much stronger than the Favorite Stevens model and with the lever spring in front, never a loose dropping lever problem.
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32RF ammo is available on a hit and miss basis. Old stocks of modern mfg Navy Arms brand shows up from time to time. It was made in Mexico IIRC. I see it a shows quite often. Pricey but it's not something you normally plink with anyway. SOG (Southern Ohio Gun) used to have it listed in their ammo section for sale but I don't see it in their latest flyer. I think it was about $30/box of 50 last time I saw it. Boxes of Canadian CIL (?) ammo also shows up at shows.