Janice;
That would be correct for a 1905-1908 9W1. They did not say Singer anywhere on them. When I mentioned Singer part numbers they were strictly numerals, 6 or 7 digit I forget for sure which. The word Singer or Simanco was not included only the numbers. Most of these machines had the numbered seam guide lines on the needle/throat plate with the part number in front of that. The right slide plate has a hole with "Oil Here" marked around it with this plate attached by screws. I am not certain if this changed prior to Singer's take over or not, but most W&W D-9's you can slide the plate open & the oil hole is in the casting beneath it, you cannot oil through the plate. Incidentally I have one attachment set on which each attachment has at least one part number on it, some of the attachment which have more parts to them have more than one number. These are the only W&W attachments I have with part numbers, so feel certain they were made/sold by Singer.
I am adding a link to a picture from needlebar's W&W picture library showing a plate with a SN beginning with 3. Click this & see if it works;
this picture you can see the number 3,042,701, the Oil Here, the two screws attaching the plate. Also on the throat plate you can see the numbered seam guide lines & if you look real close just to the left of the guide line numbers above the attaching screws you can make out the part number, though due to the darkness of that area of the picture it is unreadable. You can tell there are numbers stamped there though.
Miller/TN
