Specifications
| Reference | GM-901-1 |
| Case | High-grade Stainless steel (316 L) |
| Plating | Ion Plating with 5 micron |
| Dimension | Size approx. 44mm without crown |
| Movement | In-house Tourbillon 20 Jewels |
| Specs | Dual-Time with Sun & Moon phase |
| Dial | Skeletonized engraved |
| Indexes | Roman numerals & Stick |
| Lens | Sapphire crystal |
| Hands | Skeletonized with super luminova |
| Clasp | Deployment buckle |
| Band | Genuine cow leather |
| Warranty | 2-year warranty |
| Water Resistant | 3 ATM |
| Brand | Theorema Germany |
| Sold by | Tufina since 1828 |
| Packaging | Original Theorema box |
| Included | Manual, warranty & Tufina future $50 gift card |
