There were two versions of the Model 19 NRA, the main and most noticeable difference being the stock.
The original 19 NRA's had a military-style stock with finger grooves and a long forearm, whereas the later 19NRA's (sometimes called a 1933) had a more modern target style stock with a wider beavertail forearm
Early 19 NRA
Later 19 NRA
Bookmarks