Citizen Auto Dater Seven 25 Jewels Ref. ADST 51302-Y - March 1965 | NOS
The movement of this Citizen Auto Dater, manufactured in March 1965, is encircled by a large ring featuring inward-facing teeth. This ring rotates with the movement of the wrist, winding the watch's mainspring. This particular piece—equipped with the unique automatic system that Citizen dubbed the "Jet" movement—has survived to the present day in "New Old Stock" (NOS) condition, meaning it has never been used.
**IMPORTANT NOTE: As this item is shipped from within the European Union, you will not be liable for any customs duties within the EU.**
The Jet’s oscillating weight rotates on a large-diameter ball bearing, with the internal teeth of the ring transmitting motion to the winding mechanism. This system, which winds the watch in both directions, is fully visible when the case back is opened. The inscriptions "CITIZEN AUTODATER SEVEN" on the rotor ring and "TWENTY FIVE JEWELS" on the central fixed bridge confirm the identity of the movement.
Citizen continued to refine the Jet system, which it first introduced in 1961. The Auto Dater Seven, launched in May 1964, combined the brand’s "Easy Change" rapid date-correction feature with day and date displays. According to Citizen’s official historical records, this model was the first men’s automatic wristwatch in Japan to feature a rapid date-correction mechanism. The 25-jewel movement in this piece operates at 18,000 vibrations per hour and can also be wound manually. The date is advanced by pulling the crown one step further out from the time-setting position and then releasing it. The day of the week is displayed in a gold-colored oval window at the top of the dial, while the date can be read beneath a magnifier positioned at 3 o’clock. The delicate "CitizenAutoDater" script between them and the crown-shaped "7" emblem at the bottom serve as the model’s distinctive details. The silver-toned dial features a radial texture that radiates from the center, creating reflections that shift with the light. Gold-toned applied indices and angular hands stand out clearly against this surface. A blue "40M" accent complements the "Parawater" designation typical of that era.
The 38 mm steel case is considered quite large for a men’s watch from the 1960s. A gold-plated, fluted bezel and a highly domed acrylic crystal define the character of the design. The two-tone bracelet, featuring small center links, secures with a folding clasp signed by Citizen. The case back bears an embossed "7" emblem, a "STAR" mark, and the reference number ADST 51302-Y. The serial number, 50302924, indicates that the watch was manufactured in March 1965.
Final Note
In unused, "new old stock" (NOS) condition, this Citizen offers a unique opportunity to examine its "Jet" movement technology alongside perfectly preserved period details. The sharp teeth of the bezel, the surfaces of the case, the fine printing on the dial, and the applied indices all retain their original appearance, despite the watch being over sixty years old.
The item you are viewing was manufactured in 1965.
PROFESSIONALLY FULLY SERVICED.
The movement has been completely disassembled; every component has been cleaned, lubricated, and precisely adjusted to ensure flawless operation. (Requires no maintenance for three years, provided it is not exposed to adverse conditions.)
Product Condition: Tested; all functions are in full working order.
