Pocket Watch Size
Information
Please
do not call us for antique pocket watch information and/or values.
At this time, we do not offer appraisals.
We are not staffed to answer calls for antique
pocket watch information and appraisals.
Please see our watch information section,
or visit the NAWCC
Message Board if you need further assistance.
THANK YOU FOR YOUR UNDERSTANDING!
18s, 12s, 3/0... what does this mean?
Below is a table to convert an American pocket watch size to inches
and millimeters. This measurement refers to the size of the
movement, as measured at the dial plate, not the case or dial.
| Size (Lancashire) |
Inches |
Millimeters |
| 20s |
1 5/6 |
46.56 |
| 18s Common |
1 23/30 |
44.86 |
| 17s |
1 22/30 |
44.02 |
| 16s Common |
1 21/30 |
43.18 |
| 14s Common |
1 19/30 |
41.48 |
| 12s Common |
1 17/30 |
39.78 |
| 10s Common |
1 15/30 |
38.10 |
| 8s Common |
1 13/30 |
36.40 |
| 6s Common |
1 11/30 |
34.70 |
| 0s Common |
1 5/30 |
29.62 |
| 3/0s
Common |
1 3/30 |
27.94 |
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Watchmakers and hobbyists - Click here for
the free downloadable version
(must have Adobe Acrobat or equivalent to view the .pdf file).
Images and all other content copyright
2003-2008 Pocket Watch Site. Unauthorized use without written consent
is prohibited by law.
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