A most unusual 1930's (?) - 1940's Sheaffer

Picked this up a while ago. Goes well with my *striped* gray non-WD version. Daniel has a WD brown striper. A most unusual Sheaffer, one most here perhaps have not seen before. It is imprinted "Sheaffer"

Think about what makes it a bit off the beaten path for Sheaffer from that era.