18.80 mm x 18.80 mm x 1.22 mm (thick), square “planex type” (flat top, curved inside), original vintage, mineral crystal, to fit Jaeger-LeCoultre®

* Perrin Supply Ltd is independent of and not affiliated with or sponsored by Jaeger-LeCoultre®. Jaeger-LeCoultre® warranty does not apply to parts supplied by Perrin Supply Ltd.