Help ID this switch blade type rigid fork

[mattbrown]

my S-bike frame has a heart on the rear brake stay

 

[24pouces]

Perhaps IRD ?

 

[Retro_Roy]

I think they are the far east copy,s .apparently they weigh a bomb

i agree with this. workmanship is nowhere near as good as on a true tange or bontrager switchblade. they also weigh about 1 1/2 times as much too. picked up a set off ebay super cheap awhile ago. i think i even did a post on them here asking similar questions. they look good from a distance or to the untrained eye.
roy

 

[kd498]

http://www.retrobike.co.uk/forum/viewto ... highlight=

http://forums.mtbr.com/vintage-retro-cl ... 65100.html

Same question i asked here and elsewhere a while ago.

 

[Thunderchild]

I weighed the fork and it is 1.2 Kg with a 135mm steerer. I would say that was a bit on the heavy side. I have no comparison, so anyone have a weight to compare?

taffy asked if there was an allen head bolt to hold the steerer on. There is a phillips head screw at center of the back of the crown. Assuming it is for the steerer, but could be for a fender?

Thunderchild

 

[Thunderchild]

Just found this catalog of Tange tubing and forks from 1997. Doesn't completely solve the ID issue, but interesting. There is one picture of a switchblade. Remember the shock blade...

http://www.equusbicycle.com/bike/tange/ ... index.html

Thunderchild ]-