Convair Precursor Research and Application Module

[Triton]

Model of Precursor Research and Application Module from General Dynamics, Convair Aerospace Division, from unknown space project. Manned Orbital Laboratory (MOL)?

 

[Archibald]

Don't know for "precursor" but Research and Application Modules (RAMs) was the accronym of Spacelab ancestor in 1970-1972 era. In other words, a can carried in the Shuttle cargo bay.
The flight global archive has some information on this concept. The name "spacelab" came only after 1972 and Europe involvmnet in the project...

 

[OM]

...Actually, this sort of looks like the guts of that Atlas-based space station, the one that Hawk produced a kit of in the early, early 60's.