The ARPA viewer was manufactured by Productos Arpa
Color S.A. in Cordoba, Spain in the early 1950's. In looks it is, in many
ways, almost identical to a Sawyers Model C, but unlike the Model C the
body is bolted together and the reel advance lever is slightly larger.
There is a surprising weight difference between the ARPA and the Model C,
with the ARPA weighing in at 205g and the Model C at a lightweight 170g.
The colour of the viewer is a dark reddish-brown.