Reddit reviews Silverline Tools - Hand Plane No. 4-50 x 2mm Blade
We found 2 Reddit comments about Silverline Tools - Hand Plane No. 4-50 x 2mm Blade. Here are the top ones, ranked by their Reddit score.
Rosewood handleBlade width 50mmSimple rapid adjustment machanism
Looks good, they don't ship to Germany though. I thought about this plane
https://www.amazon.de/dp/B000LFTOE2/
And these sharpening stones, although I worry they might be too small?
https://www.amazon.de/DMT-Diamond-Whetstone-Mini-Diamantstein-extrafein/dp/B00004WFTD/
An intermediate level plane, between a modern Stanley and Veritas, is Wood River
But planes are mostly for making flat surfaces. A canoe paddle is mostly gentle curves. I've never made a canoe paddle, but I would guess that you could do fine with cheap planes on that project, such as the sliverline smoothing plane in combination with their block plane (linked in the above comment), or to move up to something more respectable, the new plastic-handle Stanley.