Movement bestiary
Every caliber in the Grail Atlas catalog, classified into one of four tiers (plus the honest “unclassified” bucket). The tier is a small additive lift to the Reliability rating — never an overrule. Owner-verified data still dominates.
Manufacture (in-house)
Brand-designed, brand-produced. Service is brand-direct, expensive, and long. The market rewards these meaningfully.
- 1400 AS
- 215 PS
- 3130
- 3135
- 3185
- 3235
- 324 S C
- 65-01
- 8800
- 8938
- 9R65
- 9S64
- Calibre 1304
- L093.1
- L121.1
- L951.1
- MT5400
- MT5402
- MT5602
- MT5652
Top-tier supplier
Widely-used high-end supplier movements (Eta 2892, Valjoux 7750, etc). Robust, well-understood, broadly serviceable.
- IWC 30110 (Sellita SW300 base)
- Rolex 4030 (base Zenith El Primero)
- Valjoux 72
- Zenith 3019 PHC
Unclassified
Calibers we have not yet classified. Honest default rather than a guess.
- 1315
- 1570
- 2121
- 26-330 S C
- 28-255 C
- 321
- 3220
- 3861
- 5100
- 561
- 9906
- AP 2125
- Cartier 1847 MC
- Cartier 1917 MC
- IWC 37524 (ETA 2892-A2 base)
- IWC 52010
- Jaeger-LeCoultre 822
- Jaeger-LeCoultre 854A/2
- Jaeger-LeCoultre 899AC
- Valjoux 727