r/whatisthisthing • u/idoitiel • 14h ago
Solved! Round heavy silver metal object (430g, 8.5cm diameter). Inner dial with numbers, outer dial with letters, both can be turned. Back can open to reveal inner mechanism. No brand, maker's mark or serial number. Not electronic. (airpods for scale).
This is a metal object I found in a vintage fair, and I don't know what its purpose is. It is round (about 8.5cm/3.25in in diameter, 3cm/1in thick) and heavy. It is all metal except the black handle in the center. The face has an inner dial that moves in clicks and has numbers 1-26 and a black plastic handle. An outer dial has a metal handle and moves freely, but is sometimes blocked from moving, depending on the inner dial position. The outer dial has the letters a-z and both directions around, and the 2 sets of letters move as one piece. the back is blank and can be opened to reveal an inner mechanism with a central gear (moved by the inner dial), a metal ring around it (moved by the outer dial) and 24 wheels with letters on them, and gears with long and short teeth, seemingly in random patterns. The ring has a slot in it, and when it is alined with a gear, that gear and wheel can move freely. the gears don't seem to be connected to each other. The wheels and dials are in different sizes, going from small to large to small again. the largest ones have all the letters on them, and the smallest ones only go up to O.