Guaranteed to fit Consew sewing machine models:
206RB-5, 206RBL-25, 206RBL18, 223R-2, 226R-2, 227R-2, 254B-3, 254RB-3, 255B-3, 255RB-3, 255RB-3D, 255RBL-25, 277R, 277RFS, 287RB-1, 289RB-2, 333B-2, 333RB-2, 339B-2, 339RB-2, 339RB-3D, 339RB-4, 339RBL-25, 369RB-2, 387RB, 389RB-2

Guaranteed to fit Seiko sewing machine models:
CW-1, CW-7, CW-7B, CW-8, CW-8BV, CW-8V, JW-28BL-10, JW-28BL-10R, JW-28BL-20-2, JW-28BL-30-2, JW-28BL-30-3, JW-28BLA-20-2, JW-28BLA-30-2, JW-8BL-10, JW-8BL-10R, LCW-6F, LCW-7, LCW-7B, LCW-8, LCW-8B, LCW-8BV, LCW-8V, LHPWN-8B-3-SF-LP, LHPWN-8BL-3, LHPWN-8BL-3-LP, LPW-26BL, LPW-26L, LPW-27BL, LPW-27L, LPW-28BL, LPW-28L, LPW-6BL, LPW-6L, LPW-7BL, LPW-7L, LPW-8BL, LPW-8L, LPWN-28BL-2, LPWN-8BL-2, LPWN-8BLC-2, LSC-8BL-1, LSC-8BLH-1, LSC-8BLV-1, LSW-8BLVMF, LSW-8LVMF, LSWN-28BL-3, LSWN-28BL/TA-3, STW-8B