Why is Seiko called Tuna? Seiko has many watches which are named after their designs. Most of the time, Seiko utilizes such strategies to make an emotional attachment with a model. This is why there are many watches nicknamed for a better impression.
Seiko tuna is also nicknamed for its design. The watch was initially released in 1975 and then continued to debut under nicknames: grandfather tuna, emperor tuna, and so on.
These watches were called so because the watch’s design is a bulky cylindrical tuna can. The case is covered with a solid tuna can-shaped material to protect the watch and accuracy. The watch was designed for divers and gives an association; if you look at the watch from the top, it would be much identical to a fish tuna can.