This vintage Gillette safety razor has a butterfly opening: you unscrew the ring under the head to open and close the razor. This way, there are no loose parts! Shaving is smooth and easy, both for the beard and for the body.
It weighs 38 grams and measures 10.9 cm. Date code: Z3 (so it dates from 1979)
This razor is second hand, look at all the pictures.
This razor is a variant of the “Super Slim Twist”. I’m not quite sure it’s a Knack (the manufacture is late, the ring is short), it looks like a hybrid between the Super Slim Twist at the end of its career, and the G2000 not yet arrived.