Seiko Credor Masterpiece GBBY993 – Exceptional One-of-a-Kind Japanese Watch
The Seiko Credor Masterpiece GBBY993 is a singular creation from Seiko Credor, showcasing the pinnacle of Japanese watchmaking and artisanal craftsmanship. This one-of-a-kind watch demonstrates Seiko’s dedication to combining traditional hand engraving with modern horology.

Five-Layer Engraved Dial by Terui Kiyoshi
The dial features a remarkable 5-layer construction, meticulously engraved by Terui Kiyoshi, a master engraver awarded the Yellow Ribbon Medal of the Emperor of Japan. Designed by Shuhiro Kosugi, known for Grand Seiko, the dial includes uppercase Roman numerals, three layers of Ruyi motifs, and a bottom mother-of-pearl layer. The reverse side features a sun motif engraved around the ruby-bearing balance wheel, adding to the watch’s artistic allure.
White Gold Case & Specifications
The 48.4 mm white gold case houses Seiko’s in-house manual-winding movement, assembled by master watchmaker Sakurada Mamoru, also awarded the Yellow Ribbon Medal. Key specifications include:
- Manual winding movement with 22 jewels
- 37-hour power reserve
- Accuracy: +25/-15 seconds per day
- Water-resistant 30 meters
- Alligator leather strap with white gold buckle
Collectibility & Exclusivity
The Seiko Credor Masterpiece GBBY993 is highly collectible due to its singular production, limited to only one piece. Priced at approximately 13 million yen, it is exclusively available in Japan, making it a true collector’s treasure.

For more details on Seiko Credor craftsmanship, visit:
Seiko Credor Official Website