Cat Converter Part Number Stamp?

[1ZZ-FE]

Having recently replaced my cat converter for an aftermarket one, I approached my local breaker to price up my old one. Problem is, I can't seem to see where the stamp/engraving is for the part number and other associated info so that he can give me a price.

I have the heat shields off and it's in a pretty bad way. If anyone has one laying around, would you be kind enough to have a look and tell me where I can find it? All cat converters have them as it identifies what precious material is inside.

Regards,
Jim.