Working on a stock 1981-82 Lotus Legend.Shimano 6 speed freewheel. Park FR1 is smaller significantly smaller in diameter and 12 slot. This is 9 slot/9 tabs and you can see approx diameter in pic. Can't find any info about what removal tool to use. Can any of you help? Thanks.

That's a Uniglide cassette. Two chain whips, one on the small sprocket, one on any of the others, and unscrew the smallest one. The rest of the sprockets will slide off.

... and because it's an early form of cassette removing the concept won't get you anywhere as far as overhauling the hub.

I'll be d%$*ed! (Mis)remembered uniglide being introduced later. And did I read cny-bikeman correctly that I won't be able to overhaul the hubs? which was the primary point of the exercise.

To be more clear, there's no need to remove the cassette in order to overhaul the hub bearings. Unlike a freewheel hub, the drive side bearing is located outboard; just remove the non-drive side locknut and cone and you'll see.

Ah! Excellent. Thanks to you all; very helpful.

Btw, if you ever decide to remove that cassette either to clean the cogs or repplace a drive side spok you can remove the cassette with ONE chainwhip. Put the bike into a large rear sprocket. Hold the crankarm firmly and use the chainwhip on the smallest cog to turn it counter clockwise. the chain on the large cog acts as a second chain whip. Once the smallest cog is loosened you can take the wheel off to finish removing that cog and then the rest of the cassette. Be careful not to lose the thin spacer that's often between and loose cogs and the riveted together cluster of cogs. I usually just use a strap to fasten the crankarm along a chainstay.

I like Uniglide cassettes because they are so easy to remove if on tour and I break a spoke.

Cheers