Ah, okay...I could be wrong on that, then. It's a very cute figurine, I must say.
Here's some prices their figurines have sold for online in the past:
This 1925 duck or goose bird figurine was estimated at 120-140 Euros ($160-187) and sold for 90 Euros in 2007. 90 Euros today would be about $120 without accounting for any inflation.
http://www.liveauctioneers.com/item/3572577This 1930 woman & peacock (?) bird was estimated at 220-290 Euros ($293-386) in 2007 and sold for 200 Euros (about $267).
http://www.liveauctioneers.com/item/1960332I've found that site liveauctioneers to often sell under value though.
So the slightly newer one was worth more, maybe the desirability of the scene or figure has more to do with the price than the age, which would be good for you since the date range on yours is wide. I would suggest this is one you may want to take to either a professional appraiser or an antique shop...or see if there is a Czech neighborhood nearby to where you live and try to find an antique shop there, maybe they will know more about the particular markings on your piece. Or, if you want to put it in an onine auction, set a reserve you're comfortable with getting for it, so that it doesn't by fluke end up selling way under value.