It should be marked on the barrel.
The Standard Catalog of Smith and Wesson, 3rd edition, by Supica and Nahas.
Early Harrington & Richardson revolvers did not HAVE model numbers, but model NAMES. In your case, the model name is "22 Special".
Should be marked on the barrel
Depedns on what the barrel is marked as to caliber. Could be rim or centerfire.
Caliber can not be idenitifed by sn. Take it to a gunsmith if it isn't marked on the frame or barrel.
It will be marked on the barrel. The barrel is marked "Made in Portugal".
Should be marked on the barrel. It is impossible to tell caliber from the information you provided.
No such caliber as .32 Special. Use the caliber of ammo marked on the gun.
IF the revolver is marked ".22 LR" yes. If it is marked ".22 WMR" or .22 Mag" or " .22 WRF", then NO.
If not marked on the barrel, take it to a gunsmith for testing.
Is there any other writing on this gun? I don't know what company would have marked marked a revolver with these initials.
MIght be a Nagant
Not marked, IIRC
Please list EXACTLY how the barrel is marked, and if possible send a digital picture. firstname.lastname@example.org
Need to know exactly how the gun is marked. email@example.com
Try googling it. I believe you will be surprised.
Blue Book of Gun Values
Usually the 44-40 is marked 44 WCF, so it is likely .44 special
Marked on the barrel.
Smith & Wesson did not mark any revolvers "Secret Service Special." Exactly how is your revolver marked? firstname.lastname@example.org
It's like asking "Car marked with 318?". More information needed. Caliber, maker, barrel length, box, accessories, condition, finish, etc..
The ones listed on the barrel. Stay away from steel shot.
No way to tell model from jus the serial number.