Thanks Jeff - Do you know if that style Heuer had a name or is just a Heuer Triple Calendar?

: This one is a classic that typifies the Heuers
: of the 1950's -- triple calendar (showing
: day, date and month), with automatic
: (self-winding) movement. The winding
: mechanism is known as a "bumper",
: because the oscillating weight that winds
: the movement does not move all the way
: around its pinion (360 degrees), but rotates
: back and forth, as it strikes a
: "bumper" and returns in the other
: direction.

: Shown below is a photo from the Omega
: Discussion Forum that shows an Omega
: "bumper" movement, also from the
: 1950's.

: Jeff

: