Case looks nice and sharp.
If it was mine i’d just get a movement service and new plexi and pressure test.
I wouldn’t have the case polished or dial changed.
Russell Talerman charged 260 or so the last time i had a 5513 done with him.
Then i’d keep an eye out on eBay for a jubilee. Those old folded jubilees usually have lots of stretch. (Wear on the pins holding the links together.)
They can be rebuilt by a guy in HK so they are as-new , but never feel as solid as an oyster imho.
Nice original looking example.
What else does he have hidden away behind the skirtingboards?