Referring to this, what does '570' one side of the Bor and '70' the other represent? Is one the model number?



The question refers to the above watch I'm helping a friend out with.. Could it be 14k if it has a gold back or is it definitely 18k?

Would appreciate advice.

 

You talking on the endlinks?
Model number of endlink.
Lower number usually older.
notice both are '70
Like on a Speedmaster '67 takes 516 endlink
earlier Speedmaster link was '16

 

Thanks, yeah, the endlinks

 

Could just a easily be gold-filled, a gold back means nothing. The gold content is normally marked between the lower lugs necessitating removal of the bracelet. BTW very few of these were 18K, most were 14K gold-filled.

 

I think the bracelet has a 14k marking.