[etech]

Hi all,

I have been reading Chuck's web page on Philco build dates vs chassis serial number. My 90 cathedral is serial #709731. The bottom of the cabinet is stamped, but only partially legible. I can read this much,
OCT 1?-4. I can't read the digit after the 1, but it might be a 3. According to Chuck's graph, this radio should have been built in very early October 1931.

So, can anyone help me decipher the stamp on the bottom of the cabinet? What could the digit be after the 1? And, what does the -4 mean?

Could it be OCT 13-4 where the '13' stands for 1931 and the '-4' is the 4th of the month?

Thanks,

Ed