With a hammer, ;)
1950s- 60s
50 or so
You will need to see a gunsmith.
The RG10 revolver, a model produced by RG Industries, typically does not feature an ejector rod. Instead, it uses a design that allows for manual extraction of cartridges. If your RG10 lacks an ejector rod, it is likely consistent with its standard design, as many RG revolvers were known for their simplicity and cost-effectiveness in manufacturing.
10-40 USD
The PIN isn't on the card.
It will probably cost you more to find one and have it installed than the piece is worth. They were made on the low side of quality to begin with.
20-80 USD or so
No published sn data. 20-60
20-60 USD or so
that pin is expired...