Rules described as "adjustable" use the DRGM 192052 friction adjusting mechanism.
| Specimens of Frederick Post models 1440, 1442 and 1450 are not known. | This identical page appears in the 1925, 1927 and 1930 Frederick
Post catalogs.
|
| These rules were made by Koch, Huxhold & Hannemann.
Rules described as "adjustable" use the DRGM 192052 friction adjusting mechanism. |