Nice find:
a Bit of history:
RIH was formed in 1921 by the Bustraan brothers in Amsterdam Holland. The name RIH is the name of an Arabian stallion ridden by one of the characters in a German Cowboy novel which was very popular at the time. Wim van der Kaaij is the current owner of RIH and has been with the company since
the late 40's.
It is estimated that RIH frames have been ridden to over 350 national championships in both road and track events and 63 World and Olympic titles.
RIH are known for their track bikes, (and their road bikes are nothing to scoff at either).
Frames are mostly built with Reynolds tubing, I'd guess yours is 531 double butted.
I own an RIH road frame, serial number 890x and it's a 1974 model so I would guess yours is a bit
newer, 72 or 73. The drilled brake bridge is a poor attempt at weight weenieism,
a carryover from the drillium craze of the 70s ?
RIH are still in business. There are 2 'divisions'
The RIH shop in Amsterdam caters to the race crowd, and the RIH-Cove is more
a city bike production shop.
http://www.rih.nl/site/default.php (dutch web site, COVE )
http://www.rihsportamsterdam.nl/ ( dutch site, Amsterdam shop).
Marty