What's up with the fiber optics on top of this AccuPoint 3-9x40? Is it an earlier generation, or is a piece missing?

[Begle1]

All the 3-9x40 AccuPoints I've seen have what looks like a single "channel" of fiber optics on top of ocular bell. With a sliding adjuster piece to control brightness.

This one I see for sale has what looks like an oval raceway of fiber optics on it, and I don't see an adjuster piece.

Is this an earlier generation of AccuPoint, or is it missing a piece? What's going on here?

 

[2buffalo]

Yes its an early model.