I'm trying to determine the approximate value of my Chronomat. I have had it for several years but am ready to upgrade.
Pics



The reference number on the back is b13050
I realize that it's a travesty, but the bracelet that I currently have on the watch is a reproduction.
The watch, however, is 100% authentic. I also have the original leather(i think that's what it is) strap.
The watch is in good shape, but is probably ready for a service and cleaning.
I don't have the box or paperwork.
Any thoughts as to the value??