Rivalley Neoprene? Stocking Waders

Tried on, but never used for fishing.
Did not have the chance to go fishing during the colder months.
Made of 3mm neoprene (or chloroprene? I forget), so they are easy to move in yet provide excellent warmth, perfect for the opening of the fishing season.
These are waders designed to be used with wading shoes, making them easy to walk in.
Stored indoors and in beautiful condition.
Almost no signs of use.
No wear on the soles, and no peeling of the silicone sealant.
There are some small silicone adhesions from when it was purchased.
Size is L.
As shown in the 12th image, they fit me well. I am 170 cm tall and weigh 78 kg.
The current L size for Rivalley is for shoe size 26.5 cm, so I believe these are also 26.5 cm.
My foot size is 26.5 cm, and as shown in the 11th image, there is some room in the toe area, but they feel snug when putting them on, so they might be tight for those with wide feet or high insteps.
Model number unknown.
Purchase date unknown.
Images 7-10 show the inside sealing, not the outer surface.