75th anniversary 1905-1980, 3000 made, Model 19-4. 4" barrel, gold inlays, wooden presentation box.
It's value depends on the condition. 3000 isn't a scarce gun. Commemoratives are worth maybe a little more than the regular production gun of the same time, condition is everything. If it is unfired for example, it is worth what an unfired 19-4 is worth, with a slight premium.