Alpina · Alpiner
Alpina Alpiner Extreme Skeleton Automatic
Reference AL-520GSKT3AE6B · Classic · 39 mm
Specifications
- Reference
- AL-520GSKT3AE6B
- Family
- Alpiner
- Category
- Classic
- Status
- Current
- Case material
- Stainless steel
- Case diameter
- 39 mm
- Case thickness
- 11.5 mm Official
- Lug-to-lug
- —
- Lug width
- —
- Water resistance
- 200 m
- Bezel
- —
- Calibre
- AL-520 (SW200 base) Official
- Power reserve
- 38 h
Official product page · retrieved October 25, 2026
Does it fit your wrist?
Enter your wrist circumference. The watch appears to scale on the flat top of the wrist.
No lug-to-lug figure exists for this reference yet, so fit cannot be computed.
Measurements and sources
Brands rarely publish thickness, lug width and lug-to-lug together. Each observation below is kept separate, with who gave it.
Case thickness
| Value | Type | Source | Date |
|---|---|---|---|
| 11.5 mm | Official | Alpina | October 25, 2026 |
Lug-to-lug
No source gave this figure yet.
Lug width
Lug width is the gap between the lugs, where the strap fits. It is not lug-to-lug.
No source gave this figure yet.
Calibre source
Official Alpina · retrieved October 25, 2026
Other versions in the same case
These references differ only by dial, bracelet or bezel colour. The brand gives them the same case dimensions, so the figures on this page apply to them too.
Other Alpiner references
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Alpiner Extreme Automatic (39 mm) AL-525BG3AE6 | 39 mm | 11.5 mm | — | AL-525 (SW200 base) |
| Alpiner Extreme Automatic Freeride World Tour Special Edition AL-525FWT3AE6 | 39 mm | 11.5 mm | — | AL-525 |
| Alpiner Extreme Automatic Titanium AL-525S3AE1B | 39 mm | 11.5 mm | — | AL-525 (SW200 base) |
| Alpiner Extreme Solarmetre AL-140BRG3AE6B | 37.5 mm | 10.19 mm | — | AL-140 |
| Alpiner Extreme Automatic (41 mm) AL-525B4AE6 | 41 mm | 11.5 mm | — | AL-525 (SW200 base) |
| Alpiner Extreme Regulator Automatic AL-650DGN4AE6 | 41 mm | 12 mm | — | AL-650 (SW461 base) |
| Alpiner Extreme Quartz AL-220BG2AE6B | 34 mm | 8.35 mm | — | AL-220 (Ronda 505 base) |
| Alpiner 4 Automatic AL-525N4AQ6 | 40 mm | 12.5 mm | — | AL-525 (SW200 base) |
| Alpiner Extreme Chronograph Automatic AL-730SB4AE6B | 41 mm | 14.3 mm | — | AL-730 (SW510 base) |
Other Alpina models
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Heritage Automatic AL-520BG3SH6 | 38 mm | 10.15 mm | — | AL-520 (SW200 base) |
| Date Manufacture AL-706W4E6 | 41.5 mm | 13 mm | — | AL-706 |
| Heritage Tropic-Proof Handwinding AL-480B2H6 | 34 mm | 9.25 mm | — | AL-480 |
| Heritage Alpiner Carrée Automatic AL-530N3C6 | 32.5 mm | 10.55 mm | — | AL-530 |
| Heritage Carrée Automatic 140 Years AL-530BA3C6 | 32.5 mm | 9.71 mm | — | FC-530 (SW261 base) |
| Startimer Pilot Automatic (40 mm) AL-525BW4S36 | 40 mm | 11.5 mm | — | AL-525 (La Joux-Perret base) |
Show 10 more
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Startimer Pilot Solarmetre AL-140BLW3S26 | 38 mm | 9.32 mm | — | AL-140 |
| Startimer Pilot Automatic (41 mm) AL-525BBG4S26 | 41 mm | 11.5 mm | — | AL-525 (SW200 base) |
| Seastrong Diver Extreme Automatic AL-525B3VE6 | 39 mm | 12.65 mm | — | AL-525 (SW200 base) |
| Seastrong Diver Extreme Automatic Alpina x The Real Time Show AL-520G3VE6 | 39 mm | 12.65 mm | — | AL-520 (SW200 base) |
| Seastrong Diver Extreme Automatic GMT AL-560B3VE6 | 39 mm | 12.8 mm | — | AL-560 (SW330 base) |
| Seastrong Diver Extreme Automatic x Route du Rhum – Destination Guadeloupe AL-525T3VE6 | 39 mm | 13.4 mm | — | AL-525 (SW200 base) |
| Startimer Pilot Quartz Chronograph Big Date AL-372BW4S26B | 41 mm | 12.75 mm | — | AL-372 (Ronda 8040 base) |
| Diver 300 Heritage (AL-520BY4H6) AL-520BY4H6 | 42 mm | 12.3 mm | — | AL-520 (SW200 base) |
| Diver 300 Heritage (AL-525S4H6) AL-525S4H6 | 42 mm | 12.3 mm | — | AL-525 (SW200 base) |
| Startimer Pilot Chronograph Automatic IFR Alpina x Watch Angels AL-570NW4S46 | 43 mm | 15.9 mm | — | AL-570 |