White 1600 Speedylock Instruction Manual by Charissa Duskin - issuuInstruction Manual For White 1934d - Juki MO-634DE overlock/serger machine. 4 threads. Works great. Comes with the 4 cones of thread as seen in the photos and the foot pedal. Great price on a great machine.. www.SewingSupplyWarehouse.com has been serving your embroidery, sewing, and quilting needs since 2000. We are an authorized dealer for Brother, Simplicity, and Handi-Quilter.. I have the Babylock Evolution, which doesn’t come with all the problems that the less expensive sergers have. Unfortunately, most DVDs, books etc, are geared towards teaching you about issues, such as threading, tension, stitch fingers which are not relevant with the Evolution..