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Replacing Guard Pins

From The American Horologist magazine, July, 1944

Replacing Guard Pins

Sometimes we find that a guard pin will have to be replaced and the method to Use is very simple. Take a piece of brass wire a little larger than the hole in the fork, place this wire in a pin vise and file to a very slight taper, then burnish. Enter this wire in opening and force to friction tight, then cut off wire leaving it project slightly below fork, then file off the wire edge and with a small hammer tap wire in flush with lower side of fork. In the event it is for a single roller, have wire just long enough to high polish. This also applies to corks and fingers used in holding the parts, everything used in polishing must be absolutely free of oil stone.

For the beautiful damaskeen finish found on the exposed winding wheels of high grade watches special equipment and some experience will be required.

Pitted end stones may be perfectly polished and restored as new by using a fine grade of diamond powder in oil on a tortise-shell lap running at fairly high speed in the lathe. Slight pressure for only a short time will restore them to their original polish.

Ordinary polish may be had on any flat surface after grinding with oil stone powder by finishing with a fine emery buff.

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