Hi I'm looking for a "vintage" mixte. I know that they were considered low end bikes but does anyone know of any mixte back in the day with forks that are not made of hi tensile tubing?

Lotus Excelle mixte used forks of Tange Champion and Tange Mangaloy 2001 depending on the year. The Excelle Mixte was a popular bike and isn't too difficult to find.

I've seen Gazelle Mixtes from the 70's made with Reynolds 531. Not quite the decade you're looking for...

I believe that most of the 80's Japanese mixties used hi ten forks. But, perhaps you could find something like a Fuji Espree ladies, etc.

Mercian.

Bob Jackson.

Claud Butler.

There are others. They ain't cheap, tho.

i've got a shogun and a miyata which both have tange 900 forks, more or less. no hi ten. i've also seen some univega with downtube shifter braze-ons; they probably have nicer forks too. no guarantees though.

My Centurion Cadenza has a chrome moly frame. Forks are not marked otherwise?
Just pull forks from a different bike. The sizing is common,

Edit: Tange infinity double butted tubes. Still no mention of foks

in the 80's Gazelle still made the Champion Mondial mixte with Reynolds 531.

Which Miyata has 900 forks?

Does anyone know the type of steel used on Raleigh Super Course mixtes?