70s vintage watch Certina ref AHB012 automatic ETA 2789 blue dial steel NOS

Case:
o All in stainless steel ref AHB012 
o Fine condition with strong geometry
o 35mm without crown / 40mm lug to lug / 11.5mm thickness / 18mm  lug width 

Movement:
o Mechanical automatic ETA 2789 day (spanish and english) and date quickset - serviced by watchmaker on October 2025
(movement was disassembled, washed, lubricated)

Dial & Hands:
o Blue dial in good condition

Bracelet Material:
o Original Certina in stainless steel bracelet full size with label

Conclusion / Condition:
A rare piece in new old stock condition, with a nice dial, an excellent opportunity.

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