The Fontainemelon 811 is a watch movement that features Girocap combined settings for the escapement wheel. It incorporates an indirectly driven minute hand, which allows for a large balance. This movement is a collaborative effort among several brands, including Doxa, Ebel, Eberhard, Favre-Leuba, Girard-Perregaux, Juvenia, and Zodiac. It is worth noting that the equivalence of the calibres Felsa 4035 and 4036, which are mentioned by Bestfit, is uncertain, as they are not found in other registers. The specific differences between the 54 and 54.19 variants of this movement are not known. The Fontainemelon 811 is a manual wind backwinder that was in use around 1965.