1934 “Waldemar” piano was made by Monington & Weston, London, but may not be the original name of the piano.
Kreiter of Milwaukee also made "Waldemar" pianos. However, the Berlin ones seem to have been a genuine maker, who was still around in the 1920s, although little is known or published about them. Ask your tuner to check the rear of the action for names and numbers which we may be able to date.
Dating the instrument is a little difficult. Mine came into the family in 1972, bought from the original owners who bought it new from Kendal Milne & Co. in Manchester (now part of House of Fraser). It looks like it is circa 1935 from the materials and styling which fits the story that came with it.
Mine is overstrung and overdamped and appears to be a well-made instrument with good tonality. Saw a walnut model same as mine for sale in a shop last year and another (well-used and tatty) one on eBay that fetched a couple of hundred quid.
No dates of numbers or indeed any other details are available for Waldemar, but if you can post photos here to show what the whole piano looks like, or email them to me, I may be able to tell you more. There is useful genera information about upright pianos at
If you want to search inside the piano for a date see