Singer Featherweight Slack Thread Regulator & Screw, Tension Unit, (Vintage Original) fwp One blackside machine may have

One blackside machine may have attachments that are blackside while another may have chromium and still another with a mixture of the two

and our light bulb comparison video is under the video tab

Straight Blade - Ideal for cutting strips

15/16” straight

but intermittent with the regular shiny japanned-finished Featherweights during the second production commission date

Singer Featherweight Slack Thread Regulator & Screw, Tension Unit, (Vintage Original) fwp One blackside machine may haveThis tension unit piece (part 45863) regulates the slack produce by the take up spring. The little screw that holds it on is also included (part 335), which may be chrome or black, depending on stock availability at the time the order is filled. This part fits the Singer 221, 221K, 221J, and 222 as well as the Singer 301.