Original watch case for Ulysse Nardin Isaac Newton watches.
Including the crystal and the crown. Case-back is marked SWISS MADE | STAINLESS STEEL | 4939 | WATER-RESISTANT | 155-22.
Bezel and crown 18k gold.
New, never used, with some faint blemishes from storage or handling, if any.
The watch in the last image is used only for reference, and it’s not for sale.
Please refer to the watch manufacturer’s presentation for the technical details.