Vintage 1960's Paul Portinoux 39mm Mechanical 17J Chronograph Watch Valjoux 7736

Vintage 1960's Paul Portinoux 39mm Mechanical 17J Chronograph Watch Valjoux 7736 Brand: Paul Portinoux Model: Chronograph Reference/ model number: N/A Band reference: N/A Serial number: N/A Circa: 1960's Movement: Swiss made mechanical, Valjoux 7737, movement signed JP Pingouin Service/ battery: Last service is unknown, but has been inspected and it does not need a service at this time Functionality: Tested and keeping excellent time, all functions working flawlessly (water resistance has not been tested) Case size: 39mm stainless steel Lug/ band size: Watch has 18mm lugs and is fitted with a vintage generic brown leather strap Features: Black dial, Swiss made mechanical movement, acrylic crystal, a chronograph, luminous hands and hour indicators, and a push/pull crown Box/ papers: Not included Condition I have updated my rating scale in January of 2025. The new scale that I am using rates different parts of the watch on a scale between N-R-10-1. From the highest to lowest rankings, they mean the following: N= Brand New, R= Refurbished (polished and looks new, no replaced parts), 10= Like new (store display, may have small handling marks, possibly unworn), 9= Like new (may have been worn a handful of times), 8= Excellent, 7= Very Good, 6-5= Good, 4-3= Less than Good, 2-1= Poor. Any noteworthy issues or concerns will also be listed by the numerical grade for each part of the watch. Lastly, I do not give the dial/hands a numerical grade, but a few descriptive wor