Looks like a Malerne product, but looks to have Czech key work. Both keyed joints are stamped as Made in France. The register key is the type that has the bulb sticking out, rather than the tube that enters the bore. I would guess this was made in the late 1940s or early 1950s.
Serial # 33266, written on both joints near the center tenon in the tiniest serial numbers I have ever seen.
Barrel: 62.6mm (Very short!)
Bore LH joint top: 14.5mm
Bore LH joint at bottom: 14.5mm
Intonation results taken when playing loud and not lipping. See how to interpret these results on the Wooden Clarinets main page.
Pulled 1.8mm at barrel and a tiny amount in the middle.
Intonation summary: This is quite good.
Complete pictures here.