In about the 1940s, this firm manufactured the Nall radial arm saw.
The foundry ran from 1946-2017.
Information Sources
Thanks to member Mike Levine for bringing our attention to the Nall saw.
Thanks to Alan Fuller of machinery dealer Burt Bradley LLC for providing information on a Nall saw in their inventory. Alan confirmed that the maker was Marathan Foundry & Machine Co. of Wausau.