The profile of the original hand is traced onto a flat carbon steel blank.
The outline is then carefully cut, leaving sufficient material for subsequent refinement.
A centerline is lightly scribed along the length of the blank—though not present on the original, it serves as a guide to ensure symmetry during shaping.
The hand is gradually brought to form by hand, with particular attention given to the balance and proportion of each side.
At this stage, the surfaces are refined and prepared. As the original hour hand had previously been repaired and appeared slightly shortened, the new hand is made with a subtly extended length to restore visual harmony.
The tube is turned separately on the lathe, allowing for precise control of concentricity and a clean, true circular form.
The hand and tube are then carefully press-fitted together.
The hand is intentionally made slightly oversized at the center.
After assembly, it is carefully adjusted to achieve a seamless transition between the hand and the tube.
Final shaping is undertaken with reference to the corresponding minute hand, ensuring coherence of form.
The surfaces are then brought to their final finish, followed by thermal treatment to obtain a traditional blued steel tone in harmony with the other hands.
The hour hand is thus completed.