Vintage Longines men's hand winding watch. working

Here we have a Manual winding Longines Swiss made watch from the 1970's. It use a cal 526 manual wind movement and is in good running order. (See the watch Accuracy Meter trace). It is in a 20 micron gold plated case with stainless steel back It comes on a useable tan leather strap. The watch measure 33.5 mm in diameter excluding lugs and winder. Have a look at this watch, decide what you think it is worth and make me an offer.