Kaiser-Frazer used the following sets of numbers for different categories for things:
under 100001 - Hardware (generic type nuts, bolts, etc). Dealers & distributors could order from Parts and Service
100001-200001 - Accessories and items related to accessories. Dealers & distributors could order from Parts and Service
200001-300001 - . Dealers & distributors could Accessories and items related to accessories & general replacement parts
300001-400001 - PRODUCTION LINE INVENTORY that included cloth, body parts, interior trim parts and many other items
400001-500001 - Used for Allstate-specific parts and other items. Dealers & distributors could order from Parts and Service during July 1953.
500001-600001 - BILLING NUMBERS for things like crating of large items (fenders, doors, even body shells)
600001-700001- Used starting in 1953 to cross-reference Willys Motors (aka Willys-Overland) items that worked on Henry J and other K-F product.
7600001-800001 - PRODUCTION LINE INVENTORY for items cast (like cylinder heads), stamped items and other reserve items.
800001 and above - Willys Motors/Willys-Overland parts that replaced old 200-series KF part numbers
The 300- seriues numbers might be the casting/stamping/dle casting numbers for a part. Many car owners have seen the 300- series and 700- series numbers on actual K-F parts packaged in the 200- or 100- series numbers that are in parts books dealers used.
Best suggestion is to take pictures with a yard stick or ruler to show size (length, etc) and show the numbers on these items. It can be helpful to identify what may be what.
