#1 is an LF.IXe or XVI.
#2 is an LF.IX....I think
#3 is most likely an LF.IXe
#4 is an LF.IX
#5 is an LF.IX (I don't recall any XVI's going to the Russians)
#6 is an LF.IX
#7 is an VIII, most likely an LF
To be perfectly honest, I don't know of any way to tell an LF.IXe from a Mk XVI just by looking at it. I'd have to look up serial numbers to be sure. #7 was particularly easy though.
Are a couple ways ....sometimes.
XVI's only ever had 4 'spoke' wheels, IX's had 5 and 4 spoke.
XVI's only ever had a pointed broad chord rudder, IX's also had the earlier 'round' rudder.
Plus if Russian they only got V's and LFIXs.