The PHILCO Phorum

I was digging out my '61 Ford and tripped over this. I know it's a signal generator but what model and is there documentation for it?
http://www.flickr.com/photos/42774321@N08/4482965448
Terry

If the tubes are 1F5G and 1H4G, then it's a Philco Model 177. (Battery operated.)
If the tubes are 6J7G, 6J5G and 6X5G, then it is a Philco Model 077. (AC operated.)

Early to mid-40s vintage test equipment marketed to dealer's service centers and shop owners at the time.
I have service info for both, btw.

Chuck

It's the ac model as it has a two prong connector on the left side.
Tnx
Terry