It's a Montgomery Ward machine (electric?) in a Singer base ... no mystery there. Wards bought machines made by others and added their label.

The probable manufacturer is "Happy" of Japan ... good quality machines if well cared for.

The attachments are binding feet and others. I can't ID them all.

IF IT WORKS, it could be a useful machine for someone who quilts, but unless old treadle machine bases are selling for high prices, sell it on Craigslist as a complete machine for $250 or so and haggle down a bit.

It is a Montgomery Ward machine, treadle on a singer treadle base. The feet are in a "puzzle box" aka accessory box. To determine if it works, you need to put a belt on it, which may be trying since two machine companies are involved. You need to show that the bobbin is with the machine and if all the pressure feet are there. The machine looks good. Best wishes on selling it.

Singer Featherweights can go for high prices because quilters love them, especially as travel machines. Other old machines, like yours, have chiefly decorative value, or perhaps sentimental value to family members. Someone living off the grid might want a treadle machine, but otherwise they usually sell for very little.

If it works, it's of value to somebody - maybe $75 - $100. You could donate it or see if you could get $$ for it on Craig's List or NextDoor, if you like. Is it truly a treadle machine, or is that just a treadle base? I see power cords...?