Well, I bid on the listing and here is what I won:
1. The box
(complete with graffiti ‘Krankenwagen’ – ambulance!) This is certainly genuine.
Front
Back
Side
Side
Ends
Here is the box front, cleaned and with graffiti removed using Photoshop®
2. The car
This matches the one shown on the box, though it has a radio aerial at the front, not present on the car on the box picture. I made number-plate stickers to match those on the box picture.
3. The instruction sheet
This doesn’t belomng here! The sheet (3080713) is from set
3140, a horsebox and jeep set from 1986.
4. The horsebox
This is probably not from set 3134 either, because it has stickers on the back from set 3140 and not the blue stickers shown in the 3134 box picture. But the plastic parts look a match for the 3134 box picture.
I used blue stickers from set 3505 from 1978 when I made the picture below.
5. Horses, klickies and accessories
I assembled these by consulting the box picture.
30 02 1770 2x Horse saddle, black
30 02 3460 2x Balloon string, light grey
30 04 1340 2x Bucket, small, with holes for handle, steel blue (or similar)
30 04 1370 2x Handle of bucket, steel blue (or similar)
30 06 4050 2x Jacket lapels, joined in front, black
30 60 2430 1x Trailer Dolly with wheel; chock blocks [2], black
30 60 0900 1x Sign, Warning Triangle, With Stand, black
30 65 7380 1x Horse (old-style) light brown
30 66 2000 1x Horse (old-style) dark brown
[30 80 0520] 1x (similar) Stickers for warning sign, licence plates, and red cross
k3388 2x Man, classic style, brown hair, red torso, red arms, white legs (fixed wrists)
p3543a 1x Dog, small shepherd-type, tan
(Unknown part number, suggest p3174xa) 4x Cuff, wide, old-style, black
(Unknown part number, suggest p3326xa) 2x Riding hat, old-style, black
(Unknown part number, suggest p3164xa) 1x Suitcase, old-style, 2 equal halves, light blue