Unknow insignia

[clevischi]

Hello,

I would appreciate some help in recognize this one, it came from a vet widow.

Thanks all.

[Duzig]

Hello,
Taking a wild guess I'd say maybe it's a workers badge or identification item for someone who worked in a factory. Is the wording Lumophon? That would be my guess,a factory id badge.
Duzig

[clevischi]

Thank you for the information. Searching at google, i found that is a radio factory: