It stands for Ernest Francillon & Compagnie (EF&Co >> EFCo) and its a part of the companys logo registered in 1889 by E. Francillon, together with the winged hourglass and the name Longines.

How much does a Longines service cost?

Every watch we repair is meticulously inspected, repaired, sealed then tested to Longlines standards using only Longlines original parts. Our superior Longlines Watches; Longines time only from £85.00. Longines time and date from £95.00.