I have a Burley Duet tandem that I'm getting into riding condition, and I've been looking to add a drum brake to it. (Didn't have one when I bought it on craigslist, but would have had one originally). The prices for the used Arai brakes seem crazy on eBay, so I picked up this strange brake for cheap:
Used Arai Drag Drum Brake with Cables | eBay

Yes, I know it was a gamble. No, I didn't know exactly what I was buying. But, I don't need high-end and I was hoping it would work. For the price, I took a shot.

It arrived today and I opened it up. First of all, the hub it's attached to came off easily, it wasn't actually mounted with any force. I've never seen the "standard" arai brake in person though so I can't compare to tell what I have on my hands. It is made out of heavy stamped steel.

Does anyone out there have any wisdom on what this brake is, and if it'll work on standard 8/9/10 speed tandem wheels and my frame?

Here are some more photos I took:


Thanks for your help!