Reference 3A Grand Veena

Still waiting for the magic moment when my GV break in.
I have done some experimenting with speaker wires and so far the speakers are very revealing of differences.

I experimented with placement and have been quite satisfied with a wider separation and radical toe in so that the image is well in front of the listening seat.
I also have them 5 feet out from the wall and I sit 14 feet away.

I have found this sounds better than close spacing and minor toe in as reccommended by manufacturer.

The image is stable, tight and well focused and the room is taken out of the equation somewhat.

I would like to know how to distinguish between the newest improved version and the original ones.
Do the serial numbers give a clue?

OCC internal wiring
Mechanical grounding of drivers
Soft brass screws and washers for driver
Copper shorting rings on midrange
Larger brass cones and floor pads
5 way binding posts with tellerium copper
Occ binding jumpers
Don't know what # this started at but it is very recent.
Would assume that if it has the brass screws, it has all the upgrades.

I believe the screws are brass, painted black on tweeter and mid.Super tweeter is brass, woofers aren't painted,so they appear to be reg non brass screws.Also different screw heads.
The speakers have spikes,and they are black/grey,I can't tell if they are brass, but they don't seem like cones.No floor pads.
The speakers came with Cardas solid copper jumpers,not wires.
The binding posts are 5 way, with clear plastic I can't tell what they are made of.
Maybe I should check out the internal wiring and see what is inside.
I believe the improved wiring sheath is supposed to be clear?
I seem to have 6 of one and half dozen of the other

The list was passed out by Tash at RMAF. Those are the improvements.
The older versions don't have those improvements.