Yep, it's a header mounted radio speaker. Quite common on the mid- to late-30's cars. My '37 Chevy coupe has one, as does my '36 3w.
ok so that means i should have a radio? ha ha stupid question radios were common then? thanks ahead of time flyn
Radios were available as an accessory from Ford starting in 1932 but were far from common. Aftermarket radios were also available. Early car radios could be split into 2 or 3 parts. A control box on the dash board or steering column. The chassis with tubes under the dash or under the hood. And the speaker in a separate location, possibly with the amp attached. You might see the speaker box as on your car. A control on the dash. And a square box full of tubes under the dash or under the hood. All connected with plug in wires. The antenna could be the chicken wire in the roof, or a square of tin on the bottom of the running board.