goodiewrench - the link you posted shows an early 1919 NRA (pre 1923) that has a much later No 25 hooded sight which shows up for the first time in the 1940 parts catalog.
[Linked Image]

The gun you reference also has the early rectangular bolt but has the more open ejection port and two screw rear sight - the only differences from the very early ones that I know of.

The 1919 NRA was updated in 1923 with the 'new 23A' bolt. These 1923 versions were also offered in 22 SHORT, not just the early ones. I am still tring to find out what magazine was sent with the guns in 22 SHORT - I have never seen a magazine for one just marked for 22 SHORT.

Riverpines gun should have the early small ejection port with that low a serial number.

Gene

Last edited by GeneB; 05/05/11. Reason: added picture