Part ID help - NOS Defroster Vents

[PeterC]

Any help ID'ing these NOS Ford flathead vents will be most appreciated - bigger ones on the left have part# 27258

 

[Bruce Lancaster]

The ones on the left look a great deal like '46-48 type. Don't have dimensions handy.

 

[Kube]

Any help ID'ing these NOS Ford flathead vents will be most appreciated - bigger ones on the left have part# 27258

As Bruce has advised, the ones on the left are 46 - 48. Not certain if they are only hot water type heater or hot air as well. The ones on the right are 1940 only and ONLY hot water type heater.