Patek Philippe 1966 Rare ‘Tank’ White Gold Dress Watch – Reference 3521

Incredibly rare ultra thin white gold Patek Philipe ‘Tank’ (reference 3521) from 1966! An exceedingly rare reference and appearance from Patek Philippe. This particular watch is not offered for sale often, let alone in the pristine condition this watch finds itself in. Scroll down to read more about this watch.



This watch is accompanied with an original vintage brown crocodile leather PP strap and its very rare original 18K white gold buckle.
Furthermore the watch is presented with a service pouch and a Patek Philippe service receipt from 2011 (confirming both the case and movement numbers, not as pretty as the original Extract form the Archives but nevertheless a proof of originality).

The watch remains in an overall superb and original condition.
The elegant and exceptionally thin white gold case looks to be unpolished and free of any deep scratches or dents.
There are some superficial scratches, nothing unusual for a 56 year old watch.
Original PP winding crown.

The silver tone dial features black Roman hour indications and a ‘swiss’ signature.
Elegant white gold baton hands.
The dial remains in undamaged condition and is corresponding with the overall superb condition of this watch.

Patek Philippe used a F. Piguet ebauche to produce their own ultra-thin 9 ligne watch movement. Although based on this venerable design, Patek Philippe modified the movement extensively. They added their patented free-sprung Gyromax balance and finished the movement to Geneva Seal standards.
This caliber 175 movement is as clean as it gets showing its incredible beauty, craftsmanship and finishing measuring only 4 millimeters in thickness (total watch (!) including case, dial, hands and crystal).

All in all an incredible timeless design made 56 years ago remaining in almost the same condition as it left the factory back in 1966.
Proud to offer this watch to you and happy to help with any further questions you might have.

Please note we handle an 24 hour purchase/shipment processing policy as all our watches are located in a bank safe.

Feel free to contact us if you have any questions, require more pictures/information or if you would like to know our guarantee and return policy.

We thank you in advance for your interest in our beloved watches here at Mokum Watches in Amsterdam.

Additional information


Patek Philippe


25mm x 35mm


Hand Wound




18 Karat White Gold





Box & Papers

Service Paper & Pouch



Serial Number