[TowerTalk] Triband Beam???

[K0YR]

I had an old beam laying around in a bundle. I decided to resurrect it for our club field day. It seems to look like an a4s, but the traps are smaller and the measurements are are greater between the traps. I do not know how old this is. The brackets on the mounting plate are similiar to the a4s. If this is and older a4s, would anyone have a manual to match???
Tom, K0YR