70's vintage watch mens Eterna Matic KonTiki 20 ref 633.1003.41 jumbo steel blue

From 70s this rare Eterna-Matic KonTiki 20 ref 633.1003.41. Gerald Genta design steel watch with screwed crown, working well..

Case:
o   All in stainless steel sharp edges with marks and scratches all over,  ref. 633.1003.41
o   Fine condition with strong geometry
o   37.7mm without crown / 43.5mm lug to lug  / 11mm tickness /  20mm lug width
o   Mineral crystal with minor scratches
o   Screw crown

Movement:
o   Mechanical automatic 12824 25 jewels (upgraded ETA 2824) - working well...
 
Dial & Hands:
o   Untouched blue textured in good condition

Bracelet Material: 
o   New 19mm light brown leather with generic chromed buckle
 
Conclusion / Condition: 
elegant and usual camy in great working condition..

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...