Pocket Watch Crystal Chart

Please do not call our us for antique pocket watch information and/or values.
We do not sell, research, nor offer appraisals or values for, used, vintage, or antique watches.
The information provided is for reference only.

Please see our watch information section, or visit the NAWCC Message Board if you need further assistance.
THANK YOU FOR YOUR UNDERSTANDING!

The chart below shows the relative size of a crystal labeled in Lignes to its size is millimeters.
For example, a crystal labeled 19 4/16 is 43.4 mm.
Another example, if you have a bezel that measures about 36.2 mm, the crystal size would be about 16 1/16 Lignes.

Watchmakers and hobbyists - Click here for the free downloadable version (must have Adobe Acrobat or equivalent to view the .pdf file).

Please Note: For informational purposes only. At this time we do not sell or offer crystal replacement.

Ligne
Size
0/16 1/16 2/16 3/16 4/16 5/16 6/16 7/16 8/16 9/16 10/16 11/16 12/16 13/16 14/16 15/16
6 13.5 13.7 13.8 14.0 14.1 14.2 14.4 14.5 14.7 14.8 14.9 15.1 15.2 15.4 15.5 15.6
7 15.8 15.9 16.1 16.2 16.4 16.5 16.6 16.8 16.9 17.1 17.2 17.4 17.5 17.6 17.8 17.9
8 18.0 18.2 18.3 18.5 18.6 18.8 18.9 19.1 19.2 19.3 19.5 19.6 19.7 19.9 20.0 20.2
9 20.3 20.4 20.6 20.7 20.9 21.0 21.1 21.3 21.4 21.6 21.7 21.9 22.0 22.1 22.3 22.4
10 22.6 22.7 22.8 23.0 23.1 23.3 23.4 23.5 23.7 23.8 24.0 24.1 24.3 24.4 24.5 24.7
11 24.8 25.0 25.1 25.2 25.4 25.5 25.7 25.8 25.9 26.1 26.2 26.4 26.5 26.6 26.8 26.9
12 27.1 27.2 27.4 27.5 27.6 27.8 27.9 28.1 28.2 28.3 28.5 28.6 28.8 28.9 29.0 29.2
13 29.3 29.5 29.6 29.7 29.9 30.0 30.2 30.3 30.5 30.6 30.7 30.9 31.0 31.2 31.3 31.4
14 31.6 31.7 31.9 32.0 32.1 32.3 32.4 32.6 32.7 32.9 33.0 33.1 33.3 33.4 33.6 33.7
15 33.8 34.0 34.1 34.3 34.4 34.5 34.7 34.8 35.0 35.1 35.2 35.4 35.5 35.7 35.8 36.0
16 36.1 36.2 36.4 36.5 36.7 36.8 36.9 37.1 37.2 37.4 37.5 37.6 37.8 37.9 38.1 38.2
17 38.3 38.5 38.6 38.8 38.9 39.1 39.2 39.3 39.5 39.6 39.8 39.9 40.0 40.2 40.3 40.5
18 40.6 40.7 40.9 41.0 41.2 41.3 41.5 41.6 41.7 41.9 42.0 42.2 42.3 42.4 42.6 42.7
19 42.9 43.0 43.1 43.3 43.4 43.6 43.7 48.4 44.0 44.1 44.3 44.4 44.6 44.7 44.8 45.0
20 45.1 45.3 45.4 45.5 45.7 45.8 46.0 46.1 46.2 46.4 46.5 46.7 46.8 46.9 47.1 47.2
21 47.4 47.5 47.7 47.8 47.9 48.1 48.2 48.4 48.5 48.6 48.8 48.9 49.1 49.2 49.3 49.5
22 49.6 49.8 49.9 50.1 50.2 50.3 50.5 50.6 50.8 50.9 51.0 51.2 51.3 51.5 51.6 51.7