Well, I checked my SD. It has a regular BoR bracelet. Here is an example with the same bracelet on eBay,
https://www.analogshift.com/products/enicar-sherpa-super-divette
If you look between the lugs, you should spot the case’s gold status. Either plaque or filled. If the former, there should be a number indicating the amount of micron plating. Then latter should indicate the gold filled content.
As for the movement, my educated guess is you have a 1010. Easy...
Nice example. It has a version of the EPSA compressor case. The tab on the case back indicates that.
As it is an automatic, my best guess is that it has a 1035 movement.
They are very robust watches. Well worth getting it serviced my a competent watchmaker. Also, be certain to point out that...
Nice watch. It most likely has a 1147 or 167 caliber movement. Have a good watchmaker open the case back and examine the movement. Have it serviced. It should last for a lo time.