[RichardHead]

Trying to clear out some spare parts, and came across a 8-spd cassette that I can't identify (no lockring).
It's a Shimano HG-type, 2 spiders, all "shiny," approx. 167 grams, 11-13-14-15-17-19-21-23 config.
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I've poked around on the 'net, looking to narrow it down using the range, but nothing I've seen is 11-23. Maybe it's (was) a 9-spd. missing one??
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Any thoughts??

 

[SilverStar]

Looks like an Ultegra, but missing the 12t cog. Purely a guess on my part...

 

[Dave Hickey]

It's not Dura Ace...either 105 or 600/Ultegra

 

[MR_GRUMPY]

It's part of an Ultegra 9 speed cassette. 8 speed cassettes never had cog groupings like that. They were all individual plate sprockets.

 

[RichardHead]

OK, thanks all!!
I'm going with missing cog 9 spd.