Venco Z36W informs DxCoffee readers:

"Radio club Nikola Teslaÿ Z37M, this yearÿ is celebrating 70 years. For that case fromÿ

October 1-stÿ till 31 Decembar will use special call Z370M (Zulu tree-seven-zero-mike)

Qsl via Z37M -ÿqrz.comÿinfo!"

http://www.dxcoffee.com/eng/2017/z370m-s-e-s/