The last five characters of the VIN should be numbers. I just looked through the deTomaso Registry. Although this car is not listed, the LY in the VIN says that it was built in June of 1971. That would indicate that it is probably 01602 or 01702. I would guess that the 7 was not stamped clearly and looks like a /. You could look at the plate in the front trunk or it may be on your state registration slip or insurance card.
I hope you are successful in finding it a good home.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.