Seiko 022458 screw for oscillating weight. From a 5606.

Also suits:

245, 2451, 394, 395, 400, 410, 603, 790

4005, 4006

5601, 5605, 5606

5621, 5625, 5626

5641, 5645, 5646

6105, 6106, 6117, 6118, 6119

6138, 6139

6155, 6156

6201, 6205, 6206

6215, 6216, 6217, 6218

6245, 6246

6601, 6606, 6619


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