Here we have for enthusiasts, hobbyists and collectors alike, a gently used house hold serger. A" So Fro White brand Speedylock 904". Almost identical to Babylock BL3-406/406D! The manuK for this model is available online or I can send the link! I purchased this item at an auction and I am unable to use it as I am new to sewing and just can't quite get the tension set up. This is advanced for me and I am searching for a self threader. Everything works and she has quite a bit of speed. The item is rare and Japanese made during the Juki era of White Speedylocks.( 1970s). I am open to offers and will answer any questions! Thanks