'A record check with Cody could probably find out how many non-standard chambers were ordered......It would probably take at least eight hours minimum looking through the original factory ledgers at the museum"
The LCSCA has a copy of the Cody/Marlin shipping records; and seldom (I've not seen an example, but observe the never say never policy) are such details noted in the shipping ledger pages. For the most part all that is contained within those records are serial number, gauge, barrel length, grade, inspector initial, and ship date. After 1918 the ledgers were modified to include frame type (standard or feather weight) and factory code designations to indicate the factory options each gun was ordered and shipped with; ejectors (prior to 1918, Smith guns with factory installed auto ejectors were identified by serial number block), Hunter One Trigger, beavertail, vent rib, etc).