Rare Vintage (1990s) Seiko “Tank” (Model 7N00-F020) Ultra Slim Unisex Quartz Watch With Brand New Italian Fine Calf Leather, Anti Allergic, Strap.


Marvellous collectible watch. In good working order. Keeps perfect time. Please browse all 24 sets of photographs attached for size, weight and condition as they are self explanatory.


Kindly note this watch is not new so there are signs of use. If you are extremely particular you may wish to change the glass (see last photograph) and replace the inner rubber seal to ensure its water resistance (it will also ensure the watch face is held more securely). It is a lovely genuine watch. I purchased it myself in my younger days. I’m a pensioner now so time for a new owner who I hope will appreciate it as I have done for over 35 years now!


This timepiece is a vintage unisex Seiko Quartz "Tank" style dress watch, powered by the reliable 7N00 quartz movement. The precise model configuration printed at the bottom of the dial indicates it belongs to the 7N00-F020 casing series.


Lovely watch. Heavily inspired by classic Art Deco aesthetics, featuring a rectangular gold-tone case accented by ornate, sculpted "fancy" column lugs.


Has a cream / off-white outer dial decorated with elongated, stylised serif numerals, centered by a distinctive oval inner minute track stamped with the "Seiko Quartz" signature.


The Seiko 7N00-F020 is a classic, minimalist unisex dress watch featuring a distinctive rectangular (tank-style) case, powered by a highly reliable Japanese quartz movement.


Watch Specifications:

Movement: Seiko

Caliber: 7N00 (Quartz)

Display: Analog

Battery: 321 watch battery (SR616SW)

Case Style: Rectangular "Tank"

Case Thickness: ~ 6mm

Display Features: Plain dial, often minimalist with stick markers or Roman numerals

Movement Specifications:

Movement Dimensions: 6 \(\frac{3}{4}\) x 8 Ligne (15.3 x 18.2 mm)

Thickness: 2.10 mm

Frequency: 32,768 Hz

Jewels: 17 jewels

Hand Size: 65 / 110 (Minute / Hour)


Built with an ultra-slim profile intended for understated formal or casual dress wear. It is paired with a superb textured brown leather strap.


This specific reference lineage was produced primarily during the mid-to-late 1990s by Seiko in Japan.