Privately made stationery, Madrid to Seville.
Small Madrid CDS (circular date stamp)
Aboard are a Sc# 214 10c King Alfonso 12th postage stamp, and the obligatory Sc# MR3 5c War tax stamp.
Guess : to support the 3rd Royalist Civil War.
Stationery : Private embossed cover "VIUDA DE ARANAT" (Widow of Aranat?)
Contents suggests a very large order of porcelain ?
Addressed to PICKMAN Y CIA Seville.
Background to Pickman, Seville: