Black "ST" hands have an "S" in the minute hand and a "T" in the hour hand. The minute hand is 2-5/8" long from the center of the square mounting hole to the tip. Minute hand has a 3.5mm square hole, the hour hand has a 5.0mm round bushed hole.
Hands for Mechanical Movements|Hour & Minute Hand Sets for Mechanical Movements|Seth Thomas Clock Hand Sets|Hands & Related|Clock Repair & Replacement Parts