[TowerTalk] Need Help Identifying Yagi Antenna

[DENNIS BRICKEY]

Hey Antenna Gurus,

I am trying to identfy a 5 element monoband antenna that appears to be a 10 meter yagi. I need to determine the manufacturer so 
that I can get a manual for it.  The element mounts, boom, and boom to mast hardware look Hygain.  The element tubing is not.
The outter tubing of each element appears to have a seam and is attached to the next larger length of tubing by self-tapping 
screws as opposed to hose clamps.  Finally, the antenna has a hairpin match. Obviously not Hygain.  Does anyone have any ideas?
Is the beam older than Hygain and built by a pre-Hygain company?  How are Wilson yagis constructed?

Any help is greatly appreciated!

Best Regards,

Dennis N4DD