Jack A4 Synchronizer PCB For Jack under bed trimmer plain sewers lockstitch machines. Part Number 1383300600 Synchronizer disc Part No 1383300900 If you have a Jack A4 A4S A5 A4S-7H or A4H series sewing machine with a auto foot lift. This is the direct drive Synchronizer PCB assembly for this class of sewing machine. Trojan Sewing Machines Supply Equivalent Single Needle Lockstitch, And Needle Feed Machines. Model’s Jack A4, A4S Jack JK-9100BS-7 and Jack JK-609C. All with modern designs and the latest technology. All competitively priced.
