That is the date of a patent owned by J. Stevens Arms & Tool Co.
That patent date indicates a J. Stevens product.
its worth 325 dollars
I have a 1913 model 16 ga riverside arms shotgun . all it says , is the date made and company so on mine there is no ga. indication .
50-100 USD or so
That patent date identifies a Stevens single shot.
1913
what is the manufactureing date a hero arms company for 12 guage shotgun serial number 781
If patented in 1913 the shotgun is most likely was made before 1920. There is not really any way to get an accurate date without knowing more about the gun.
According to Remington, it was made in 1913.
If you have a single shot shotgun,then it is worth 50 dollars,if you have a double barrel shotgun then the value could be up to 400.00 dollars,depending on the overall condition and the bores are in good shape.
Sorry- not possible to answer with only that information. Aug 1913 is likely a patent date. Please repost your question listing ALL markings, and describe the gun- rifle, shotgun, handgun, caliber, etc.
No published sn data.