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A luxury mechanism with a fantastic dial design. Made in Germany Boston Pionier is going to deliver reliability, tradition, and a sense of belonging due to its concept being a hereditary piece. The open-heart has an excellent well-finished engraving tone
| Reference | GM-518-4 |
| Case | High-grade stainless steel (316 L) |
| IPG gold plating | With 5 micron |
| Dimension | Size approx.44 mm without crown |
| Movement | Automatic with 22 Jewels |
| Sub-dial | Sun & Moon Phase |
| Dial | Multi-tone |
| Index | Baton & Roman numerals |
| Design | Open-heart |
| Lens | Sapphire coated |
| Clasp | Deployment buckle |
| Strap | Genuine leather |
| Warranty | 2 year warranty |
| Water Resistant | 3 ATM |
| Sold by | Tufina since 1828 |
| Brand | Pionier Germany |
| Packaging | Original Pionier box |
| Included | Manual, warranty & Tufina future $50 gift card |
Mechanism
With attention, planning, and careful execution; hundreds of little parts come together to make each timepiece a scientific marvel, as well as a work of art. One could not mistake the singular modernity of our products - the high standards of manufacture, production, and style motivate the Tufina's aesthetic. From the precision of our sketches, the meticulous detail of our watches, and the quality of our skeletal mechanisms, we’re building our practice on a long-renowned set of engineering standards from this part of Europe.

















