The Hamilton Ventura was presented at a New York press conference in January 1957 and is regarded as the world’s first battery-powered wristwatch. It was made by the Hamilton Watch Company of Lancaster, Pennsylvania. Inside was the electric calibre 500, an 11-jewel movement beating at 18,000 vibrations per hour, in which a small 1.5V battery, developed with the National Carbon Company, powered a conventional balance wheel through electrical contacts instead of a mainspring. Battery life was about one year. It was not a quartz watch, as quartz only reached the wrist with Seiko’s Astron in 1969. The boomerang-shaped case was offered in the top versions in solid 14k gold, and launch prices ranged from 150 to 2,000 dollars. The Ventura matters because it was the first step away from purely mechanical wristwatches.

The case was drawn by industrial designer Richard Arbib, who had previously worked on cars and on wartime military equipment; historian Jarett Harkness reports that Arbib later admitted the shape was based on a bomb design. The original calibre 500 had fragile contact wires and needed frequent service, so Hamilton revised it with the 500A and then, in 1959, the calibre 505 with sturdier contacts. Elvis Presley wore his own white gold Ventura in the 1961 film Blue Hawaii and owned several, sometimes giving them as gifts. The screen-worn watch was bought back by the brand at auction in 1999 and is shown in its museum. From 1997 the Ventura appeared on the wrists of agents in all four Men in Black films.

Collectors see the Ventura as a landmark of mid-century American design and of watch technology, though its shape is openly polarising. The early electric movements have a reputation for unreliability: contacts were prone to contamination and arcing, specialist servicing is hard to find, and many vintage pieces have been converted to quartz, which lowers their value. Grailr estimates vintage 14k gold examples with a working calibre 505 at roughly 2,000 to 4,000 dollars. The original electric Ventura is no longer produced; electric movements were phased out in the 1960s as quartz arrived. The Ventura shape is still in production today, with Hamilton making stainless steel quartz and automatic versions, including the Elvis80 models with the H-10 calibre.