Time Pieces, Parts & More. 1800′s Dueber 18S Key Wind 3 Ounce Coin Silver Pocket Watch Case. This is suitable for a 18S movement. Good condition for age. Hinges are tight and open to 90 degrees. T The crystal is glass. Few dings on the outside of case as shown. If you are purchasing a watch band or part, it is your responsibility to ensure that the sizing is correct for your watch. Measurements and specifications are included in the description and we can always provide additional information upon request. We take great care in packaging the items to assure they arrive safely at your hand. This is the safest option for both parties. We are a small business and operate on slim margins. We will only accept return when an error was made on our end e. Discrepancy or misrepresentation in the description.