Maker and Role
Instrument Laboratory Services, Manufacturer
Possibly a frequency counter? Note - Other parts belonging to this item have yet to be found. Chassis is plated metal (possibly Cadmium). Model 1220-2x Serial III. A pretty heavy, rack mount chassis. Chassis has 4 different physical types of valves, plus 1 x plug-in crystal. Some of the stages use miniature valves on top of tuned coils (1 is labelled "Sync. Shaper", another as "Divider"). A "Count"/"Test" switch is mounted behind the power transformer.
Signature/Marks and Type
INSTRUMENT Laboratory SERVICE / CLEVELAND, OHIO / MODEL 1220-2X SER.NO.111 Maker's Plate
Instrument Laboratory Services. Frequency Counter, F182.2001. The Museum of Transport and Technology (MOTAT).