It is a vintage watch from the West End Watch Co., a Swiss company that was founded in 1886 and specialized in making watches for military and railway use. It belongs to the Prima series, which was introduced in 1934 and featured shock-resistant movements and luminous dials. It has a black dial with Arabic numerals, . The back is marked with “West End Watch Co”, “Everbright”, and “Swiss Made”. It has a stainless steel case with a screw-down back and a crown. The case is engraved with “West End Watch Co”, “Prima”, “D 3448”, and “3619”. It has a manual winding movement with 17 jewels and a frequency of 18,000 vibrations per hour. The movement is marked with “West End Watch Co”, “Prima”, and “Swiss”. It has a black strap with a stainless steel buckle. It is a rare and collectible watch that was made for military use in the 1950s.