With a hammer, ;)
1950s- 60s
You will need to see a gunsmith.
50 or so
The PIN isn't on the card.
10-40 USD
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.
that pin is expired...
20-80 USD or so
20-60 USD or so
No published sn data. 20-60
Find a good gunsmith or machinist