I just wanted to get an idea of how old my cymbals are

I have an 18" 2oo2 black label CRASH which has been cut down to a 15" in the past not to sure when. The serial number for that is what i think reads 000466 or 009466 there is a line through the third digit hence im not sure if its a 0 or 9.

The other cymbal is a 20" 2oo2 black label RIDE which looks to clean to be an original so i think it is one of the reissues, anyway the serial number for that is most definatly 733518

any help with this would be greatly appreciated!
Cheers!