1) count the heat fins 6 for V1 and 7 for V2
2) Also V2 the heatbreak screws right in the alu block on the V2 there is a plate with a gap screwed on top of the alu block
You can see a V2 in their shop to compare to yours
All printers from batch 4 and up are fitted with V2 extruders (shipped end of march)