Can anyone identify this connector?

I'm restoring a 1910 Singer sewing machine as a Christmas present for my wife. Hopefully, it's well received, otherwise, it will probably make a hole not only in my head, but also the drywall behind me, as that sucker's fairly heavy...

Anyway, there is a short power lead from the motor that has a pin-style connector to connect to the power cord/speed control. The connectors have a 2 piece housing with a threaded cover, and I'm missing one of the covers. I've tried looking on eBay from sellers parting out sewing machines, and also contacted online vendors specializing in Singer restoration parts, but so far nobody has been able to help me. Can anybody here identify these connectors, either by manufacturer or the name of the style?

I've hotlinked a few images for your viewing pleasure:

I'm guessing these were banned decades ago, because you could theoretically remove a cover and touch line current while the machine was plugged in or something? Are there any "modern" connectors that are similar in function and appearance?

Thank you all very much for any suggestions you may be able to provide

EDIT: pics fixed

Hotlink no work.

Holy Cow! The only place I have seen that connector is on my old watchmakers lathe. I reused it on mine when I rewired it. I have no idea where to find a replacement, maybe try this guy.

http://www.dashto.com/

He specialises in antique and vintage watch makers tools. He may have a lathe to part out.

Find a "parts" sewing machine for the part? Or some other electrical appliance from the same era. Try antique/junk stores, yard/garage sales, too. It's a little late in the year for those--if you live where winter is setting in, but worth looking one morning.

Large machine resale houses may have something sitting in the back of the wharehouse.... Or, simply bypass it, and hardwaire the controller to the motor. It's a small part of the machine, and I don't think she'll notice it that much. BTW, very nice thing to do.

I should add, my lathe is made by Boley.