Usually the 44-40 is marked 44 WCF, so it is likely .44 special
It will be marked on the barrel.
It should be marked on the barrel.
Where will be marked on the barrel/receiver.
The caliber will be marked on the Barrel, the year made is 1983
It should be marked on the barrel or frame.
Where will be marked on the barrel or receiver. When is 1977.
We cannot tell from a serial number. The caliber is marked on the barrel.
Should be marked on the barrel
It will be marked on the barrel where it was made.
Impossible to know the caliber with only a serial number. It should be marked on the barrel.
It is marked on either the receiver or the barrel.
Right side, directly below the ejection port. Barrel will also be marked with SN.