Philatelie Equator Cover?

I recently acquired a cover, obviously philatelically inspired, sent by W. D. Neimann of Bonn, Germany. A Google source dates the addressee to the post WW II period (1946-1947) as a cachet and first day cover maker. Another source suggested it went into philatelic publishing around 1948 and I have seen a couple of titles listing it as publisher.

Does anyone know what became of Philatelie Equator? Still in existence?

Thanks.

Don

I see covers dated 1947 & 1948. Published material from 1948-1949 and then nothing about this company.