Thanks for the likes, Luis, Jale and JMBL.
Let us start today with the Nemrod Palma mask, introduced in
1973. This model is likely named after Palma (de Mallorca), the capital and largest city of the autonomous community of the Balearic Islands in Spain (above). It is situated on the south coast of Mallorca on the Bay of Palma. The Cabrera Archipelago, though widely separated from Palma proper, is administratively considered part of the municipality.
Image above from the 1973 Nemrod catalogue. The French caption draws attention to the "mini size" of the model, its security rim, its compensation facility and its purge valve.
More Palma imagery:
So a binocular dive mask with low internal volume and a nose pocket for ear-clearing.