70's vintage watch mens Yema ref 311122 chronograph valjoux 7733 BIG EYE rare

Case:
o Metal chrome and stainless steel back ref. 311122 ( with marks/ scratches and signs of age)
o Fine condition with strong geometry
o 37.5mm (without crown / 20mm (between lugs) / 13mm (tickness) / 46mm lug to lug
o New generic crown
o Bi direction bezel with signs of age

Movement:
o Mechanical manual wind chronograph Valjoux 7733 - serviced by watchmaker in June 2024
(movement was disassembled, washed, lubricated) - photo oftimegrapher 
Although the chronograph is revised when it is activated, it stops at 15 minutes, also stopping the watch, sold in this condition.

Dial:
o With signs of age gray and blue

Band Material:
New 20mm in black racing style with white stitching

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...