Longines, Neuchatel Observatory Contest Watch, unused, very rare, circa 1968.
It was exhibited at the prestigious Neuchatel Observatory in Switzerland and was the prototype of the later Ultrachron. The Cal.431 watch equipped with this watch has the highest frequency of 10 vibrations of its time, and the working dial is reminiscent of the instruments used only in customer service at that time. The number of pieces produced was extremely small, and its future market value is unknown due to its rarity. The watch is in excellent condition and has never been used, with a protective film on the back and a sticker with the movement serial number. Comes with original strap and buckle.
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1968 Longines Prototype Ultra-Chron Presented to The Observatory Contest in Neuchatel (N.O.S)
| Manufacturer | Longines |
|---|---|
| Model | Prototype Ultra-Chron |
| Year of Manufacture | 1968 |
| Reference no. | 8056-1 |
| Product no. | B-10076 |
| Price |
Item details
| Serial no. | 15,234,*** |
|---|---|
| Caliber | 431 |
| Movement no. | 14,628,*** |
| Movement type | Automatic |
| Material | Stainless steel |
| Case size | 35mm |
| Case type | Screw back Water-resistant |
| Dial | Original |
|---|---|
| Type of Indices | |
| Belt | Original (18mm, lug width) / Original Buckle |
| Evaluation case | 98％ |
| Evaluation dial | 98％ |
| Evaluation mov | 98％ |
| Condition | 5 |
| Rarity | 5 |
Other details
Case: There are some scuffs from storage, but the back of the case retains the protective film and the sticker with the machine's unique number.
Dial: Slightly aged, but very clean with no noticeable scratches or stains.
Movement: Never used. We will be happy to adjust it and deliver it to you upon request.
Dial: Slightly aged, but very clean with no noticeable scratches or stains.
Movement: Never used. We will be happy to adjust it and deliver it to you upon request.