Is this a signed piece? Although his studio produced many religious themed items in the 50's, how are you identifying it as a Paul Hesse studio piece? At any rate, the Infant of Prague is a popular religious figure, though value would be quite modest on this piece, in my opinion. Hesse or no Hesse.
I haven't found any of the "Infant" lenticulars yet other than a photo of one here at the bottom of the page- Fine Art Dimensionals After reading up some on Paul Hesse and Harvey Prever your item may be worth more than I originally thought, if you can find the right person to buy it. Though I wouldn't want to try and put a price on it myself. There doesn't seem to be many out there.