Part Number: 8604
Singer Models:29-4, 29K2, 29K3, 29K4, 29K10, 29K11, 29K12, 29K13, 29K14, 29K16, 29K17, 29K18, 29K21, 29K22, 29K23, 29K30, 29K31, 29K32, 29K33, 29K53, 29K55, 29K56, 29K70, 29K71, 29K73, 59-1
Bobbin Class: Uncommon
Bobbin Material: Metal