Whilst sorting through some Tsumeb minerals recently we came across this label, with the dealer information cut off.
All we had to go on was the hand writing and a "crossed hammers" symbol on the left.
With a little help and research we have traced this to Rolf Fahle a well respected mineral dealer and authority on Tsumeb and Namibian minerals from the 1970s-1980s.
Fahle ran a business called Okavango minerals, and published a definitive list of Tsumeb minerals in 1977 working with Wolfgang Bartelke.
Both guys have been honoured with minerals named after them, Fahleite and Bartelkeite.
We have added Rolf Fahle to our dealer/collector archive with a bit more about him.