Sea-Gull D813.581 is 44mm in diameter excluding crown,
13.25mm thick, weighs 110 grams, equipped with ST2553 automatic 25-jewels,
green dial, silver case, green canvas wristband. Although the size is
relatively big, it has to be big to appear like a man. This is a well-built
leisure or field watch to show off one's masculinity.
As illustrated in photos, Sea-Gull logo at 12 o’clock,
"automatic, Chinese military watch since 1964" at 6 o’clock, a tank
on solid stainless steel back. Year 1964 was the start of quantity production
of aviation chronograph 1963. 1964 represents the pride that Sea-Gull produced
the 1st army watch for the air force.