OT Relays?

[Grue]

I went to an auction last week and bought a station wagon, sold as a result of a security company liquidation.

The vehicle must have been hurriedly reposessed as there were 34 new relays? in tubes on the back seat.

They are black, 21mm wide, 15mm deep and 15mm high with 8 pins on the base. The pins are located 2 per side with the ones on the widest face close to each end.

These are marked:
FRS6-1
DC 12V
1A/125V AC

and a blurred brand mark which looks like F~C (can't read the ~ but it's a lower case something).

Can anyone identify these for me please, I hate to throw out something that could be useful.

Thanks.

Glenn