Yes, Jim is correct. Those are Alden model EA, Series "C" machines.
The top unit has a motor and gearbox assembly, which is capable of copying maps at two different scanning speeds.
Each of the six "modules" below perform a specific function which made servicing very easy. A nice option was the module extender, which allowed a module to remain powered when testing.
Most machines were connected to telephone circuits, but could also be used with a shortwave receiver and a frequency shift converter. Eventually, the telephone weather circuits switched to digital (DiFax).
I had a unit for many years copying news photos and weather fax. Eventually the wet paper was no longer available, and attempts to make my own were less than successful.
Today there are many software programs which will copy the few remaining weather fax stations, but like the mechanical teletypes, they just isn't the same as the old machines.
If Nick or anyone else is interested, I have an operation/service manual, as well as the schematics.
Pete