Illinois Balance Staffs

The delicate balance staff is one of the parts most frequently destroyed when a watch is dropped or sustains a forceful blow. The tiny pivots on each end of the balance staff are prone to bend and sheer under unreasonable force. When the balance staff is broken, it must be replaced by a staff matching the same dimensions as the original. If a factory-sized staff cannot be purchased, one must be fabricated using a watchmakers lathe.

When purchashing a replacement staff, pay attention to the avialable pivot sizes available. Many manufacturers also slightly modified the staff simensions, leading to some part number available in different variations (small/large collet, old/new style, short/long hub, etc). Keep this in mind when evaluating the avaialble staffs for a watch movement. It is recommended that the old staff be removed a measured prior to purchasing a new staff. Replacing a staff is a skilled operation requiring special tools. Please contacts a reputable watchmaker that specializes in antique watches if you are not equipped to replace a balance staff.

Movement Size	Part Number	Length (mm)	Balance Seat (mm)	Hairspring Seat (mm)	Roller Seat (mm)	Hub (mm)	Pivot Sizes	Image	Purchase on eBay
18 Models: 5	60/47601	6	1.27	0.75	1.10/.65	1.07	12		Buy Now
18 Models: 1, 2, 3, 5	79/47602	6	1.28	0.95	0.61	1.35	11.5,12		Buy Now
If the Illinois 79/47602 staff is unavailable, there might be interchangeable alternatives. See the interchangeable list.
18 Models: 4, 6	19/47632	5.75	1.28	0.95	0.61	1.35	11,11.5,12		Buy Now
If the Illinois 19/47632 staff is unavailable, there might be interchangeable alternatives. See the interchangeable list.
18 Models: 5	1280/47603	6	1.28	0.75	0.61	1.35	12		Buy Now
If the Illinois 1280/47603 staff is unavailable, there might be interchangeable alternatives. See the interchangeable list.
18 Models: 6	599/47604	5.9	1.28	0.75	1.12/.58	1.05	11,12		Buy Now
18 Models: 6	1281/47605	5.75	1.28	0.75	0.61	1.35	11,11.5,12		Buy Now
16 Models: 4, 5, 6, 7, 8, 9	662/47606	5.3	1.26	0.76	0.61	0.44	11,11.5,12		Buy Now
16 Models: 6, 7, 8, 9, 11, 12, 13, 14, 15	1506/47633	5.32	1.27	0.76	1.12/.58	0.44	10.5,11,11.5		Buy Now
16 Models: 10	1684/47608	5.04	1.26	0.76	1.11/.58	0.44	11,11.5		Buy Now
16 Models: 4, 5	114/47609	5.3	1.26	0.95	0.61	0.45	12		Buy Now
14/16 Models: 1, 2, 3	335/47610	5.6	1.26	0.76	0.61	0.58	10		Buy Now
If the Illinois 335/47610 staff is unavailable, there might be interchangeable alternatives. See the interchangeable list.
12/13 Models: 1	1763-1/47611	3.2					8		Buy Now
12 Models: 1, 2, 3	1763-2/47612	3.3	1.12	0.52	0.58	0.32	8.5-9		Buy Now
If the Illinois 1763-2/47612 staff is unavailable, there might be interchangeable alternatives. See the interchangeable list.
12 Models: 1, 2, 3, 4	836/47613	4.2	1.11	0.76	0.5	0.39	11-2		Buy Now
If the Illinois 836/47613 staff is unavailable, there might be interchangeable alternatives. See the interchangeable list.
12 Models: 1, 2, 3, 4	871/47614	4.27	1.11	0.76	0.5	0.36	11-12		Buy Now
If the Illinois 871/47614 staff is unavailable, there might be interchangeable alternatives. See the interchangeable list.
12 Models: 1, 2, 3, 4, 5, 6	1425-1/47615	4.42	1.11	0.76	.90/.44	0.4	9.5-10.5		Buy Now
12 Models: 1, 3	1425/2/47616	4.42	1.11	0.76	.90/.44	0.4			Buy Now
8 Models: 1	272/47617	4.42	1.25	0.94	0.47	0.42	10		Buy Now
8 Models: 2	772/47618	4.52	1.12	0.8	0.5	0.44	10		Buy Now
If the Illinois 772/47618 staff is unavailable, there might be interchangeable alternatives. See the interchangeable list.
4/6 Models: 1	158/47619	4.17	1.12	0.8	0.5	0.4	10		Buy Now
If the Illinois 158/47619 staff is unavailable, there might be interchangeable alternatives. See the interchangeable list.
Models: 1, 2, 3, 4	957/47620	3.92	0.92	0.67	0.5	0.36	9-9.5		Buy Now
If the Illinois 957/47620 staff is unavailable, there might be interchangeable alternatives. See the interchangeable list.
3/0 Models: 1, 2, 3, 4	957/47620	3.92	0.92	0.67	0.5	0.36	9-9.5		Buy Now
If the Illinois 957/47620 staff is unavailable, there might be interchangeable alternatives. See the interchangeable list.
3/0 Models: 4	989/47621	3.92	0.92	0.65	0.55	0.44	9-9.5		Buy Now
If the Illinois 989/47621 staff is unavailable, there might be interchangeable alternatives. See the interchangeable list.