ICM has reboxed its B-26 line of Marauders and now offers a B-26C variant.
From the instruction’s history, the “B” variant was built in Middle River, MD (near Baltimore), and to expand production capacity during WWII, the “C” variant was built in Omaha, NE. Physically, they look virtually identical.
The other ICM B-26 variants (B, G, & F) have been reviewed by fellow IPMS-USA reviewers and can be viewed at these links:
https://reviews.ipmsusa.org/review/b-26b-marauder