It might depend on the brand. I'm not really into jewlery and watches, but i think some brands might be worth more than their weight in gold???
~Snipped~
No, your wrong, AFAIK brand has nothing to do when it comes to jewelry but it's weight and material used on it (this is how it is here in my country of residence).
Hello. I was wondering would someone would be willing to loan 1btc for a 18 karat gold wrist watch collateral? Thank you.
As mentioned by Amph, it's value is way lesser than what your asking for and collateral's used for loans should have more value than the loan itself, something around 20 to 30% more worth is the ideal thing in order to protect the lender.