Crosley Fiver Horn they have figured out that

they have figured out that fabric could be placed in front of the opening and therefore it was no longer necessary to go through the laborious and expensive process of painting the horns to match the cabinets

By the late 19th century

It was probably used on both Model T and Model A automobiles

Uses standard spool thread No

Crosley Fiver Horn they have figured out thatThe Crosley Fiver Roamio iHorn is made from an exceptional and rare 1937 Crosley Fiver Roamio automobile radio coupled with a Grover Products Co. air horn. Grover Products was founded in 1937. The exact age of the horn cannot be determined. Together, they demonstrate American automobilia ingenuity They are spectacular. The Crosley Manufacturing Corp., founded by Powel Crosley Jr. of Cincinnati, Ohio, began selling low cost "Harko" crystal receivers