Hello, wondering if gold on this movement is "aftermarket" ?

I am not 100% sure but I think they are factory orginal..I bought 2 just like yours quite a few years ago..Sold one of them and still have the other..I am going to look for it when I get a chaance to see how close the serial numbers are..

The gold was factory done and fairly popular at that time. Nice watch!

I wonder why the balance cock wasn't done.