60s Vintage watch mens oversize Certina ref. 860.3510.25 hand wind 28-10 gold pl Thin

Case:
o   Gold plated bushed never polished with back case in stainless steel (some marks at back case)
o    Fine condition with strong geometry
o   38.5mm without crown / 40mm lug to lug  / 8.5mm thickness / 20mm lug width 
o   Original crown 
o   Original plexiglass in good condition

Movement:
o   Mechanical manual wind certina 28-10  -  working very well - photo of timegrapher
 
 
Dial & Hands:
    o  Untouched golden in good condition

Bracelet Material: 
  o  New 20mm dar green croco with generic golden buckle
 
Conclusion / Condition: 
A very elegant watch and rare,jumbo size for era, hard to find.

please see photos as they are part of the description.
No box or pappers, no water proof test, sold as is, any question feel free for ask...
Keep in mind that it is a vintage watch, it is normal to be 1/2 minute early or late
wrist-treasure