DIFF Subgroup
A63H 19/28 Mechanical toy railway systems
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Model railways > Mechanical toy railway systems
CPC:
Model railways (propulsion by special interaction between vehicle and track A63H18/00) > Mechanical toy railway systems
No child classifications to compare. This is a leaf node in both IPC and CPC.