Waltham 4860 Pocket Watch Balance Staff – 16 Size, NOS, 1899-1908, Square Hub (o25), Unused Vintage Part

If you're restoring a vintage Waltham pocket watch from around 1899 to 1908, this NOS (New Old Stock) balance staff is a critical find.

It's specifically for the Waltham 4860 model, which is a 16-size movement.

The seller notes it as \UNUSED,\ so it's a genuine vintage part that's been sitting in stock for decades, never installed.

It features a square hub design (referred to as o25).

This is the delicate little shaft that the balance wheel pivots on—a common failure point in old pocket watches.

If yours is broken or worn, this exact replacement is what you need to get that watch ticking again.

It's made by Waltham, so it's the real deal, not a reproduction.

It comes without tags, just the part itself.

A must-have for any serious watchmaker or hobbyist restoring a classic American Waltham pocket watch.