Citizen Crystal Seven 33 賢耀 ACSS 51401-Y (1965)

Presented for auction by Second Vintage This is a remarkable example of the Citizen Crystal Seven 33, a model that stands as a testament to the golden era of Japanese horology. Distinguished by its striking electric blue sunburst dial and premium high-jewel movement, this timepiece captures the innovative spirit of Citizen in the mid-1960s. The Crystal Seven line was named for its use of hardened mineral glass, a significant technological advancement over the acrylic crystals common at the time, and this specific 33-jewel variant represents a higher-end configuration that remains highly collectible today. Brand: Citizen Model: Crystal Seven 33 Reference Number: ACSS 51401-Y Serial Number: 51110539 Movement: Automatic, 33 Jewels Dial: Electric blue sunburst with day and date Case Size: 37 mm (excluding the crown) Case Material: Stainless Steel Production Year: 1965 Condition: Excellent vintage condition. The watch presents exceptionally well with a preserved dial and sharp case definition, supported by timegrapher results indicating healthy movement performance. Dial and Hands The dial is the standout feature of this timepiece, presenting a deep electric blue finish with a radial sunburst pattern that plays beautifully with the light. It features distinct polished steel baton markers and matching hands which provide excellent legibility. The signature heptagonal framed day window is positioned at the 12 o'clock position, a unique design trait of the Crystal Seven line, while the date window sits at 3 o'clock. The applied Citizen logo, the specific "Crystal Seven" script, and the applied shield emblem with the "7" and "33" jewel count designation are all crisp and intact, adding depth and texture to the face. Case and Crystal The stainless steel case measures a substantial 37mm, which was considered a large size for its era and offers a very modern presence on the wrist today. The case retains its original geometry with gently curving lugs and polished surfaces that show only light signs of vintage wear consistent with age. The crown is original and signed with the Citizen "C". The caseback is a screw-down type, featuring the prominent "7" shield medallion and deeply stamped reference and serial numbers, all of which remain clearly legible. The mineral glass crystal is clear and allows for an unobstructed view of the stunning dial. Movement Powering the watch is a high-grade Citizen automatic movement boasting 33 jewels, a specification that placed this watch in the upper tier of the brand's offerings during the 1960s. The movement is running within vintage tolerances, with timegrapher readings showing a rate of +14 to +20 seconds per day, which indicates a healthy mechanism offering reliable vintage performance. Strap The watch has been fitted with a new black leather strap featuring contrasting light stitching. The strap is supple and complements the sporty yet elegant aesthetic of the blue dial, securing to the wrist with a stainless steel buckle. Condition This timepiece is in excellent vintage condition. The dial is remarkably clean with no visible staining or damage. The case shows honest signs of age with minor hairline scratches but no significant dings or heavy impact marks. The movement is functioning correctly, and the quickset date and day change functions operate as intended. Dimensions The case measures 37 mm in diameter excluding the crown, offering a comfortable and contemporary fit. Remarks Finding a Crystal Seven with a blue dial in this state of preservation is becoming increasingly difficult. The combination of the "33" jewel count, the innovative day display layout, and the robust stainless steel construction makes this a versatile vintage daily wearer that offers significant historical value. History Introduced in 1965, the Citizen Crystal Seven was a direct response to the growing demand for automatic watches with day and date complications. It was notable for being one of the first mass-produced watches to utilize hardened mineral glass, earning it the "Crystal" name. The "Seven" referred to the seven days of the week, highlighted by the prominent window at the top of the dial. This model played a crucial role in establishing Citizen as a leader in innovation and style during the highly competitive Japanese watch market of the 1960s. / Second Vintage SKU: CIT-CCS-0005