60s vintage watch mens NOS Imperios 21j Automatic AS 1580 with warranty paper

A extraordinary New Old Stock (NOS) vintage Swiss automatic timepiece from the mid-1960s, with its original stamped guarantee certificate dated December 198. Impérios was a Swiss manufacture known for producing elegant, robust watches featuring high-grade ebauche movements. 
This rare model features an unpolished stainless steel case with sharp geometric lines, an outer minute track chapter ring, and a pristine sunburst dial. The case back showcases a gold cap embossed logo medallion. Powered by a gold-plated 21-jewel AS 1580 automatic movement, this collector's piece remains in museum-grade, unworn condition.

Case:
o Chromed with back in stainless steel with minor scratches, inside serial 463872
o Fine condition with strong geometry 
o 34mm without crown / 42mm lug to lug /  10mm thickness / 19mm lug width

Movement:
o Mechanical Automatic AS 1580  - In working condition - In the case of new old stock watches, we prefer not to make many changes and leave them as is for a potential collector.

Dial:
o Untouched 

Bracelet Material:
o Original Imperios strap 

Condition / Conclusion:
A rare time-capsule NOS set for vintage Swiss watch collectors, with original paper guarantee. 

please see photos as they are part of the description.
No box or papers, 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