The VZ-24 was a commercial military, sold to any country which had the money to pay for them. So the receivers were often marked with the crest or other marking specified by the customer. If no marking was specified the BRNO marking was used. Most of those on the market today have had the receiver marking removed, and those bring much less than ones with the markings intact. But some with other marks can bring more. That said, condition comes into play and also rarity. For a shooter, I would rather have an unmarked one and save the nice ones for collecting.
Jim