Yes, it might be so...I'm Croatian and I've seen lots of these kinds here. Yugoslavians copied Czechs with the same bayonet for Model 24 rifles...ricasso marking would clear any doubt.
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There are also Persian bayonets which looks similar, all having a different ' pommel ' to the German one -the German is parallel to the hilt guard whilst the Czech / Yugo and Persian variants are at an angle.
The German's also had more variations with their " saw back " and others.
This pic of a Polish bayonet shows the sloping pommel
This is the German hilt