MODEL , PARTS NUMBERS EXPLAINED
MODEL, PART NUMBERS EXPLAINED
Model, Parts Numbers Explained
PHILCO marketed their first radio in 1928 with the model number of 511 and used 2 and 3 digit numbers up until 1937, when they started using suffixes for cabinet styles. So if you had a 95 chassis, that could be in any console cabinet with 65 being a 6 tube chassis, 76 being a 7 tube, 86 or 87 being a 8 tube and a 95 being a 9 tube chassis.  Like a 95 highboy or a 87 highboy or even a 76 deluxe highboy.  In 1937 they started using 37-9X or 37-61B for example.  The first 2 digits is the year, 37 for 1937 and 41 for 1941 for example.
PHILCO's part numbering system also has some numbers that appear to be year model numbers, for example the 39-6347 is printed matter and 36-5521 is speakers.  So 27- is for bakelite parts, 28- metal parts, 30- fixed condensers, 31- variable condensers, 32- transformers, 33- resisters, 34- tubes and bulbs, 35- phongraph parts, 36- speakers, 37- chassis, 38- sub-base, 39- printed matter, 40- accessorys, 41- motors, 42- switches, 43- major sub-body's, 44- speaker cloth, and 45- hardware.
Mistakes useally happen when looking in a cabinet and you see 39-5587, that's the part number for the label, not for the radio model number.