There are many bugs for sale, there are less pre-55 cars, and there are few, very few bug like this one around.
Actually this car is speculated to be a former service car of the Baden-Baden (Germany) fire department: there is the particular paint and some equipment, like the horn set, which testifies the origin of this odd bug.
Indeed it wears a two tone red and black paint and with a badge on both doors. It actually has an extraordinary patina both on outside and inside and a history absolutely not common: by the way, the seller seems to know it so you can find it for sale at €40,000 (today $55,000) here in Choisy, France.