The modern equivalent of the Carder 110 Pop Up Knife.
The Gundlach 154 features a die-cast design and hinged operation. A small thumb screw opens the knife to replace the blade. Extra blade storage inside. A partial turn of a thumb screw is all that is needed to open this knife—no tools required. Features a flat, slim profile for close-to-the-floor cutting. Made from die cast aluminum, handle has storage space for extra blades. A lot of people like this knife, way to thin for me but you may like it. It's cheep give it a shot.
The Gundlach 154 knife is the closest match to the Carder 110 Pop Up Knife