This is a fancy Zenith vintage wristwatch reference A6621 from the 1960s.
The Zenith A6621 was introduced on the occasion of Zenith's centenary in 1965 and was produced until about 1969. The design may surprise today's watch collectors, but it was very popular back then. The bi-color dial features three silver-colored sections that appear lighter or darker depending on the viewing angle. The stainless steel case consists of a wide beveled bezel, which has a date display under a loupe at 6 o'clock. This creates the shape of a keyhole, which is why the cool nickname has become popular among vintage collectors.
The watch becomes even more special thanks to the original stainless steel bracelet made by NSA. On the wrist, the bracelet emphasizes the attractive retro design of the watch and is very comfortable to wear.
Condition report
Dial: flawless two-tone dial - date window under a magnifying glass at 6 o'clock - signed "SWISS MADE".
Case: natural wear marks - intact lines - crisp engravings of the serial number on the back - original crown with the Zenith star logo.
Movement: automatic Zenith caliber 2542PC - timegrapher: rate: -3s/day, amplitude: 299, beat error: 0.7.
Bracelet: original stainless steel bracelet made by NSA - clasp engraved with Zenith NATO star logo - back of the clasp engraved with "Brevete Steel Inox Swiss Made NSA" - bracelet length approx. 18.3cm.
Summing-Up
From the very first sight of this Zenith, one realizes: it is special. The design of this timepiece comes close to a true work of art. In addition, there is the rarity and the great condition. Moreover, this vintage Zenith proves that a collectible and exceptional vintage watch does not have to be expensive.
Serial number: 623Axxx
Int.Exe.: 36926