what are they?

[jusridin]

I picked these up yesterday simply because I didn't know what they were? Looked all over for a clue but now I ask my fellow tool junkies... One is marked s-77 and another s-51....
Give me a clue guys
http://rs1151.pbsrc.com/albums/o621/jusridin/Mobile Uploads/IMG_20140615_084323219.jpg~320x480

 

[jusridin]

 

[Hawk]

Not saying that these are quite the same but they look like some of the wrenches I used to adjust T-51 color heads on printing presses. Also known as T wrenches. They expand a cam to lock, or turn a gear for lateral/vertical adjustment.

 

[joe_padavano]

These are specialized tools for an unknown application (yeah, I know, that's helpful...).

Kent-Moore made similar tools for performing specific adjustments on carburetors. Without more info, it's tough to tell exactly what these were designed for.

 

[jusridin]

The lady I got them from said her husband worked in the same shop for 40 years, and these were the only tools he brought home when he retired several years ago. I was thinking kent more also but have failed to find them yet.

 

[softailgarage]

Not saying that these are quite the same but they look like some of the wrenches I used to adjust T-51 color heads on printing presses. Also known as T wrenches. They expand a cam to lock, or turn a gear for lateral/vertical adjustment.

x2, but also dont know if they're the same thing. Sure look like it though.

 

[Hawk]

Yep used enough during 20 years of printing presses. But I am sure other cam locks or other types of internal gearing could use them. I would love to find out which these were from.