A Schild – AS Calibre 1717 – Part No. 721 Complete Balance (NOS) Related posts: A Schild – AS Calibre 1717 – Part No. 121 Balance cock (NOS) A Schild – AS Calibre 1717 – Part No. 311 Upper cap jewel with end-piece, for balance (NOS) A Schild – AS Calibre 1717 – Part No. 330 Lower cap jewel with end-piece,for balance (NOS)