dear all,
many thanks for all the replies!
the blade is not mine, it's a friend's. thus i cannot really describe it in some more detail (as i have not seen it yet). but it's supposedly 24 inches (61 cm) long.
thanks again to all ...
p.s. - i never realized until now (after seeing the great pics above) that there is indeed after all such a blade form (a combination of diverse elements, like some sort of a bladesmith's experimental cut-and-paste job!)