Been on the hunt for one of these for the past couple of years. It's a
Dunlop AGO/30 Optical Alignment Gauge / Tracking Gauge for setting toe-in toe-out on front and rear suspension. Had one when I was racing back in the day, but sold all my equipment after the car was sold, and used the money for flight lessons.
Dunlop gauges new, go for $999.00 in the Pegasus catalog. I got this one for $250. on
ebay. In the
ebay photo it looked a little different than the one I had, after I unpacked it I discovered why it looked different. My old one from the early 80's had many plastic parts, this one was all metal, probably the same vintage as my race car. Saved enough money to pay for entry fee and race gas for a weekend, I'm happy!
.
It was all there and looks to be in working order.