Having looked a bit more closely at the recorder previously mentioned it is in fact a "HOPF - Silvertone " so well done to Guest
I believe that Hopf are no longer in business, but Saunders say they also made an all metal Treble recorder.
You would have needed a body building course ro play it if the weight of the descant is anything to go by.
My wife also says that the C sharp note leaves a lot to be desired & uses alternate fingering.
It appears that SAunders found three of these on a trip to Germany some years ago so leaving out the one we have and the other one we know about, there should be at least two others circulating in UK

Just a quick note to "Nerd" : your musical knowledge is about as good as a one legged man in an arse kicking contest. The Recorder is a fine instrument when in the right hands. Stick with your whistle .