Jack K4 Series Control Panel For Jack under bed trimmer sewing lockstitch machines. Part Number 310300500 This Electronic control panel has 220v 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. Trojan GC0518-1B All with modern designs and the latest technology. All competitively priced.
