I believe this to be an extremely rare 'wrongly coloured' version of the Wil Strijbos Dovetail Cube No.1, possibly one of the very first batches, a prototype, or a production error, I am unsure.
Dovetail Cube No.1 is usually blue and green, and Dovetail Cube No.3 is usually blue and purple, but this is a Dovetail Cube No.1 in blue and purple. The collector that this belonged to says that he has been keeping an eye on Strijbos Dovetail Cubes listed for sale on various websites for about the past 5 years or so now, and he has never seen another Dovetail Cube No.1 in blue and purple.
The puzzle is in good working order but has a few small scuffs / marks / dints on its surface, mostly on the underside.
Everything will be packaged securely and I am happy to ship to anywhere the world, as per your requirements.
I will be listing a number of puzzles on Puzzle Paradise shortly, so please see my other Puzzle Paradise adverts for some rare and interesting puzzles.
Please note: I only accept payment in GBP, and by Paypal Friends / Family, bank transfer or Wise (Please see my feedback if you have any concerns, I have been active on here for several years and have a good amount of feedback as a seller). Shipping costs will be added after the end of the auction and are to be covered by the buyer please (I only charge exactly what it costs me and I don't add anything on for packaging materials).
I can provide postage quotes upon request if you want an idea of the likely cost before bidding.
Happy bidding fellow puzzle heads.