This is a weight and bakelite collar for 3-minute wicks used in Feuerhand 175STK and 176STK lanterns from the West Germany era. These parts are not available from the 75 MSKo marching lantern with 2-minute wicks, so how about it for those who are looking for them...? To install the wick and replace it, slightly widen the entrance of the weight's wick device with a small flathead screwdriver, and push the wick down with the screwdriver to the bottom of the steps that prevent the wick from coming out. Then, lightly close the entrance of the device with pliers.