Help sourcing the correct BBS02 final drive assembly

I need to replace my BBS02 48v 750w final drive and am aware that Bafang have changed the BBS02 design over the years.
I've spotted this on Green Bike Kit, but am not sure whether mine is a version 'B' or original.

https://www.greenbikekit.com/bafang-8fun-mid-crank-motor-clutch-for-replacement.html

My serial number: 1501151182, suggests it's a 2015 model (I think :? ) and GBK states they got upgraded in 2014, but no other inscription on the motor casing suggests whether it's a 'B' or not. Maybe Bafang didn't change the specs of the final drive/axle assembly!

Could anyone give me a definitive answer on this one please?

Apologies for dragging this post up again, but does anyone know if the final drive assembly design was changed over the years?

Al, the best way to tell if you have a BBS02A or a BBS02B is by looking at the controller shell. On Luna's site they have a good picture showing the difference:

https://lunacycle.com/bafang-bbs02-750w-48v-upgraded-controller-3077/

I also saw somewhere that the change from A to B was made in 2014, so yours is probably a B, but a check based on the pictures would confirm this.