I believe it's a Giugario/Italdesign study from 1969.
Interesting. I got the 1969 date from a Polish website so seems it might be right after all..
EDIT:
I've looked a bit further into it and this is the (Google translated!) blurb about this car:
QUOTE
Skoda 720 ID Combi , Czechoslovakia 1969
five-door four to relocation car station wagon, engine front and rear wheel drive. In-line four-cylinder OHC, 1498 cm ł capacity, 80 mm bore and 74.5 mm stroke, 9.0 compression, Weber carburetor, power 63 kW (85 hp) at 5300 rev / min, torque 125 Nm at 4000 r / min . Four-speed transmission, wheelbase 2550 mm, weight 1150 kg, maximum speed 150 km / h and acceleration to a hundred for 17 s
prototype Series 720, designed by Giugiaro body station wagon (ItalDesign). None of the prototypes of type 720 with forthcoming series. Photographs is from the book "Too bad - let winged arrow".
UNQUOTE