interestingly, layout is just like British 1391406 keyboard (102-keys), which is the same QWERTY placement of letters, but this Spanish model also has keys for Spanish symbols, characters, accents and diacrtical marks (Estbl, Atenc, Impr, Ayuda, Pausa, Borra, Bloq, Mayus, Rest, Salir, Salida Campo, RePag, AvPag)

According to info e-mailed to us from one user "This keyboard was used to type into dumb terminals attached to midrange computers like IBM S/36 or AS/400 systems. The keys mentioned in the description (Estbl, Atenc. Salida Campo, etc. ) have special functions on the 5250 protocol which is the standard communication protocol between the terminals and the computer."