Welcome to the forum and congrats on your 19-3.
The 19-3 was available in three standard lengths, 2.5" , 4" and 6".
(There were a handful of 3" and 5" but they are rare)
The 19-3's were made from around 1968 to 1976 and were offered in polished bright blue or shiney nickel finish, the Stainless...