Hutch Donut Seat clamps how do u tell ?

[animal]

 Just wondering what is genuine and not 

[Waxintaxin]

difficult

but the original have a certain shape ,bevelled edges and a flat spot on the curve ?

pics will prob help

however its not easy

[series.1.rs.turbo]

Mines stamped Hutch ? ....think its 1985/86 ish ?

[pkradman]

as rich has described , but beware they did do copies like that aswell  .. i belive there is also a full radius clamp which are rare as ..ie no flat spot in the middle ... its a case of traing the eye like most things ,, and get a pic up and put the trained eyes to the test ..lol

[MartyC]

Whatever you do, don't rely on the real thing being better quality 

[steve Beech TA]

Hope this helps

Its from the well used site martin-bike.com

http://martinbike.jalbum.net/Parts/Seat%20Posts%20&%20Clamps/slides/hutch_clamps_comparison_notes_640.html

steve 

[animal]

Fantastic help that link  Understand what the radiused bevel is aswell  thanks chaps has been a great help