1965 Rodelino Chronographe with an unusual multicolored tachymeter scale. The “hole” at the top left lug is the customs stamp for Portugal at the time (what a stupid place to stamp a duty mark), manual winding movement cal. Valjoux 7734, stainless steel 36 X 36mm. case.
The Rodelino brand was sold in the Portuguese market, I think Rodelino is a funny name for a watch brand, sounds like an Italian pasta. 😆
A tachymeter scale measures how fast an object is moving. The scale can be found either on the dial or in the bezel. Most tachymeters start at 400 and end at 60, but some models can show different numbers.