Coil balance spring parts

Hello there, you're correct on all counts: this looks like a 15-180 Pivot Shoe, Series 190 Coil Balance springs (if they're stamped 540 you can use the S190-540 5 pound springs) and a 15-181 Double Clip. Also see the 15-182 Drums that work with the clip--but keep in mind too if the old support clip and drums are not broken, you can reuse them. let me know if you have questions.