Hella Police Fire Alarm sequence switch

Rare Hella Police Fire department sequence alarm switch in good used condition. The switch is working and without damages. The chrome is not 100% but without dents.

It works like an egg clock. So when this police fire sequence switch is on, the high low fanfare horns are on. The rear is stamped with “H and T”. H is in German for “hoch” for the high tone horn wire, e.g. for a 520 hz horn. T is in German for “tief” for the low tone horn wire, e.g. for a 390 hz horn.

The rear diameter is 5,5 cm, the front face diameter is 6,5 cm and the knob diameter is 4,0 cm. The last picture shows the switch in the Hella 1954 catalog. The name in German is "Schaltautomat" and Hella made three different. The switch for sale is Hella # 91/31. It has on the chrome face number 1, 2, 3, 4. Depending on the setting the fire or police signal runs 1 to 4 times.

Text in German from Hella Catalog “Schaltautomat bewirkt je nach Einstellen 1 bis 4-maligen Ablauf des Feuerwehr bzw. Polizeisignals“.

If you put horns behind the switch, you will listen to the special police fire sound. So cool! A very nice to have toy. Please note that if you want to use the switch with two horns, you need also two relays. As you can see on the last picture in the Hella catalog 1954, Hella sold relays called “Doppel Relais für Polizei, Feuerwehr mit Schaltautomat”. So they had special relays for the rare Hella switch in German know as “Schaltautomat”.

This rare switch was mounted in the 50ies in German police, fire and ambulance VWs like VW Oval Bug and T1 Fire bus. Made in Germany.