Alice, sorry, we occupy your summer topic with an apple avalanche! But
your picture of those apples was so tempting and accurate, and the Transparent's travels so fascinating.

, indeed.
Thanks, unp - apple history is always interesting - adds spice to the eating.
Is the apple still grown in Russia? Do you know it (or them

)?
Thanks too for always precise information - and terms!
The Transparente Blanche / Valge Klaar / Weisser Klarapfel became such a success, so many claim the honour of being its original "home". In books I have seen Latvia (the Riga area), Estonia (Tallinn area or Tartu area), Russia (districts bordering to the Baltic states), and more. There may also be a difference between growing place/owner/discoverer of original tree and its (first? foremost?) commercial distributor. Without an original tree or very reliable records of it, it would be a major feat to sort out. It was probably a chance seedling, I haven´t seen it mentioned as a systematic breeding result.
Since the Transparente Blanche isn't commercially very interesting in these days of supermarket roughhandling and transport, probably nobody is willing to finance a major investigation of itd origins, sadly.
Apples are even more difficult in that they can develop strains/varieties/? over time. A nice example is the Swedish Åkerö, a very special-tasting and beautiful apple (mother tree still standing, just; planted/germinated? around 1760): by now at least 2 distinctly different-looking kinds, one green, one the original yellow-pink-brick red. Relationships may be resolved with present-day DNA analysis, but there will still be the question - how many DNA differences make a different cultivar/variety?
There are 2 altogether different Transparentes around: "ours", the Transparente Blanche, and the Transparente de Croncels, but they can hardly be mistaken for each other.
Alice - the Johnny Appleseed "lucky seedling" way seems more fun somehow than today's breeding engineering!