Need a model, serial numbers are not unique accross rifles.
RW is Remington Works
RW isn't part of the serial it's Remington Works Made - 1910
It was made in 1914 and that's not RV it's RW for Remington Works.
1919
Depends on what model, RW is Remington Works and serials are not unique across models.
Early 1920
1920, pre date code.
1920 RW isn't part of the serial, it stands for Remington Works.
RW isn't part of the serial no, it stands for Remington Works 1915
RW - Remington Works, they all have that stamp. That was made early in 1917 so there will be no other date code on the barrel unless it was later replaced (after 1920).
An unmarked 22 pump would be a model 12 and RW (Remington Works) made in 1916. Marbles made sights that could be on it is that where you see Marbles? This is the same company that made the Marbles Game Getter, (Marble Arms)
Probably a Remington Model 12 -? depends on barrel, ammo made in 1914.
1919