The Trapeze is the maison's best specimen of a truth this site keeps finding: the records disagree most about the things everyone watched. Its debut is split between 2010 and 2011 depending on the reference, and its exit is recorded as a window closing in late 2017 rather than a date. A bag can be one of the most photographed of its decade and still have a file that opens and closes in disputes.
For the dater the disputes are the tool. Any Trapeze is Philo-era by definition, every genuine one wears the accent, and the whole production run sits inside a seven-and-a-half-year corridor whose edges the references themselves argue about. The file records the corridor and the argument.
A seller's precise-sounding year for a Trapeze deserves the question this file asks of every bag: precise according to which record? The honest answer here is a corridor.
Celine hands the dater a gift no other maison offers: in September 2018 the house removed the accent from its logo, citing its own 1960s collections, so a bag marked CÉLINE belongs to the Philo era and earlier, and a bag marked CELINE is September 2018 or later, full stop. An accented logo on a Triomphe, an Ava or a 16, models born after the change, is a contradiction no serial stamp can rescue. The interior stamps themselves do not read as a calendar, so date by era instead: the logo form, the model's documented birthday, and the size roster of its year, remembering that sizes have birthdays too, like the phone-dimensioned Teen Box of 2018. For any serious purchase, route through a platform authentication program: eBay physically inspects qualifying handbags in transit.
Model histories and date-code systems compiled from documented maison history, resale-industry authentication references, and period documentation, cross-checked across independent sources.