A top break
@ 100 yrs old; 10- 150 USD
50-500 USD depending on the usuals.
That is a 1960 gun and should be a '4-screw.' In excellent shape, it would list around $800
No way to answer without a detailed description.
You must call S&S to find out.
You must call S&W
Depends on exactly how it is marked, including where it was made, and condition. sales@countrygunsmith.net
Need to know exactly how the gun is marked. sales@countrygunsmith.net
Need a detailed description of ALL markings and features
The Standard Catalog of Smith and Wesson, 3rd edition, by Supica and Nahas.
No serial number so no way to date. 10-400 USD
Open the Gatlin and look on the arm the holds the chambers on. It should be stamped right there. M ***