Alpina Seastrong Diver
Alpina's dive-watch collection, referencing a 1969 twin-crown 'Super Compressor'-style diver; current lineup spans 'Diver Extreme' models and a vintage 'Heritage' sub-line.
4 references
“Differs” marks a spec with different recorded values. — means not recorded.
| Spec | AL-525S4H6 Seastrong Diver Heritage, white/black dial | AL-520BY4H6 Diver 300 Heritage, black/gold dial | AL-525K3VE6 Diver Extreme Automatic, khaki dial | AL-560B3VE6 Diver Extreme Automatic GMT, black dial |
|---|---|---|---|---|
| Case size Differs | 42 mm | 42 mm | 40.5 mm | 40.5 mm |
| Thickness Differs | 12.3 mm | 12.3 mm | 12.65 mm | 12.8 mm |
| Lug width Differs | 21 mm | Not recorded | 15.25 mm | Not recorded |
| Case Differs | Stainless steel (316L), Round | Stainless steel, Round | Stainless steel, Round | Stainless steel, Round |
| Bezel Differs | Stainless steel Internal rotating, super-compressor-styled twin-crown case | Stainless steel Internal rotating, pie-pan slope, gold markers | Not recorded | Not recorded |
| Crystal Differs | Sapphire, boxed | Sapphire, domed | Sapphire, anti-reflective | Sapphire, anti-reflective |
| Water resistance | 300 m | 300 m | 300 m | 300 m |
| Caliber Differs | AL-525 | AL-520 (Sellita SW200-based) | AL-525 | AL-560 |
| Movement maker Differs | Alpina (Sellita SW200-based) | Alpina (Sellita SW200-based) | Alpina (Sellita SW200-based) | Alpina (Sellita-based) |
| Movement type | Automatic | Automatic | Automatic | Automatic |
| Jewels | 26 | 26 | Not recorded | Not recorded |
| Frequency | 28800 vph | 28800 vph | Not recorded | Not recorded |
| Power reserve | 38 h | 38 h | 38 h | 38 h |
| Complications Differs | date, internal rotating bezel | internal rotating bezel | date | GMT, date |
| Dial Differs | White / Black (rotating ring) | Black, sunray / Gold | Khaki, sandblasted | Black / Silver |
| Indices Differs | Applied silvered indexes, 15/30/45-min markers | Applied yellow-gold-plated, elongated | Luminous markers | Not recorded |
| Lume Differs | Luminova (brand unconfirmed) | White luminescent | Not recorded | Not recorded |
| Hands Differs | Straight, arrow-tipped minute hand, Silver | Yellow-gold-plated | Not recorded | Not recorded |
| Bracelet Differs | Black leather strap, tang buckle | Brown calf leather strap, pin buckle; rubber strap also included | Black rubber strap, folding buckle | Black rubber strap, folding buckle |
| Produced Differs | 2016 | 2021 | Not recorded | Not recorded |