Chevy cab roof rear window frames

[Jordan Baker]

Just wondering if anyone can shed some info this style of rear window frame. It appears to be mounted on the outside of the roof panel. I've seen this in a few pictures.

Also can someone provide the dimensions of the frame for the wireless "talking" hole.

[Mike Kelly]

Can only comment on the early style cab 11/12 setups.

I have seen two types of cutout for the canvas " speaking tube "

On my first C8, on the cab roof panel, there is a right angled triangle shaped frame for the canvas tube to the wireless body . I still have this cab roof, can take pics if you wish .

The other type is a rectangle shaped cut out used on the C8/F8 FFW vehicles with the 1A1 body . I have drawing for this .On the FFW vehicles the cab rear glass was replaced with a metal panel, the rectangular cut out for the speaking tube has those canvas fittings .

The cutout style on your pic is new to me , never seen it before

After the WS19 set became available you would think the speaking tube would be obsolete because the WS 19 has the crew intercom facility