The PHILCO Phorum

Comparing the 660 to 665 under-chassis pictures to your photo:

[attachment=16722]

[attachment=16723]

You've got a 660.

-> Part #32 is present on your chassis, not on 665
-> Part #39 is present on your chassis, not on 665
-> Part #71 is present on your chassis, not on 665

P.S. it turns out that the 660 and 665 use the same transformer and dial scale parts.

Well this clinches it then. Thank you for the in depth research Nathan.
I love this old radio but I'm afraid I'm a neophyte when it come to the technical chassis information.
Last question on this subject: Am I correct in dating this chassis to 1935?

That seems right - and that sure does look like a date on the transformer.

The other 660 based models were intro'd in June 1935:
http://philcoradio.com/gallery2/1936a/

and had been discontinued as of January 1936:
http://philcoradio.com/gallery2/1936b/

(07-05-2018, 07:27 PM)GregL Wrote: [ -> ]Am I correct in dating this chassis as a 1935?

Nope, it is a 1936 model.

Chronologically speaking, the 660 came out in May-June 1935 with the rest of the then-new 1936 Philco line. The 665 would have come out in January 1936 as a replacement for the 660.

Just like a new line of automobiles used to be introduced in September of the previous calendar year, new radios came out in June of the preceding calendar year with "mid-season" replacements/additions in January.