I was hoping someone could provide me with some info on this chronograph I purchased this weekend at a flea market. It’s a Heuer 30 minute chronograph. It works great (I tested the accuracy against my iPhone stopwatch). I am assuming it is from the early '70s (before Tag bought Heuer). The casing seems like a very sturdy plastic and the crystal seems acrylic.
Any info anyone has would be greatly appreciated. I purchased the product for $20 (no box, no papers).