Help to identify purpose of He111 switch

[gedburke3]

Dear all,
Can anyone help me to identify the purpose of this switch.
I know that it was used in He111 and probably other German aircraft.
I have a relic of one from a He111 that crashed in 1940 and have often wondered what it was used for.
Regards
Gerry

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[Revi16]

A common switch that could be used for multiple systems.
https://www.deutscheluftwaffe.de/?s=32317

[gedburke3]

Thanks Revi16,
I appreciate it.
Kind regards
Gerry