Choose the number of the Crown and then of the Pinion, and click on "calculate". You will receive the number and the type of the relation.
Crown 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
Pinion 11 12 13 14 15 16 17 18 19 20 21 22
Use the slider to choose the type and/or the number of your relation and you will receive the number of the crown and pinion.
