[Ron Ramirez]

34-2064 is a type 44 lamp.
http://www.philcorepairbench.com/lamps.htm

Model 610 is a 1936 model. Beginning with the 1935 season (June 1934), Philco introduced each new model year in June of the preceding calendar year, just as automobile manufacturers used to introduce new cars in September (and still do to some degree, but not always).

I would suggest buying the complete service information for this model from Chuck so that you can have the voltage charts, parts lists, and all known changes.
http://www.philcorepairbench.com/schematics.htm