Seth Thomas Mechanical Clocks & Timepieces
Historical Overview of the Seth Thomas Clock Company
Seth Thomas Mechanical Pocket Watches
FAT Numbers
Factory Assigned Tracking Numbers
Complete Dataset - Standard Sort
This view preserves the original catalog order of documented non-numbered Century-grade movements.
The table below summarizes “FAT Numbers” observations already discussed above. It does not introduce new interpretations and will be updated as additional movements are examined. The notations “2DFS” and “3DFS” are recording whether the movement was manufactured with the earlier 2 Dial Feet Screws configuration or with the later 3 Dial Feet Screws configuration. The FAT Number–Derived Identifier, used for internal cataloging and analysis, is comprised of a two-digit model number, the private label name, and the FAT Number found on the pillar plate of the physical movement. The Derived Identifiers that are bolded are those that were added to the collection after the start of the FAT Number Derived Identifier project and already bear the FAT# Derived Identifier for use on Seth Thomas Fan Space and on the Pocket Watch Database. You can see that five balance bridges and one top plate have markings that are inconsistent with the marking on the pillar plate and potentially other components. These balance bridges’ and top plate’s markings are shown printed in orange below and are most likely transplanted from other movements.