Genuine Adec®, 19.50 x 17.49 mm flat mineral crystal, Adec® crystal reference A54-13743F, fits Adec® case reference 4-394275.
* H. & W. Perrin Company Limited is independent of and not affiliated with or sponsored by Adec®. Adec® warranty does not apply to parts supplied by H. & W. Perrin Company Limited.