22 4 HU CMC 2 Winged tabbed on both ends

Thanks for posting. Without photos it is tough to say. If the attachments both have wings, it is possible you have either the S380-23 or S385-23, depending on the shoe depth. See below. Additionally, some balances from the west coast have a special configuration--I need to see photos of the 'guts' or underside of the metal channel to confirm whether or not that is the case here.

Comparison of the S378, S380 and S385 balance shoes.

Thanks for the photos. Based on these, yes, I think you have either the S380-23 or S385-23, as I described above. In either case, for a stamp option choose 2240. Let us know if you have further questions.

Comparison of the S378, S380 and S385 balance shoes.