Looks group A to me, the directors are all of a similar length rather than decreasing in size as I'd expect for a wideband version. Unusual spacing isn't uncommon if someone has spent some time modelling the design to optimise both gain and directivity, the narrow spaced elements near the driven are probably there to help matching as is the small parasitic element in front of the driven, think it's variant of something Antiference used back in the B1 days. A lot of the shed products no longer use coloured end caps even for grouped designs.
I've built a couple of 19 element FM beams which have been optimised for a sharp pattern and flat response, the element lengths vary as you move forward along the boom even becoming longer at some points.
