Steve spotted this unusual NOS transfercase.

https://philadelphia.craigslist.org/pts/d/wynnewood-us-military-nos-m38-dana-18/7255426110.html

“NOS US Military Dana 18 Transfer Case for a M38 Jeep in its Original Shipping Container. This is a Museum Quality M38 Dana Transfer Case.

This was packaged in 01/12/1959.

Note: This was advertised as a Dana 18 for an M38A1 but I have just been informed that it is an NOS Dana 18 for an M38 Military Jeep. This can be installed in an M38A1 if you swap out the Emergency Brake with an M38A1 Emergency Brake.”