I believe I've located the complete version of this little vintage toy wagon--there would once have been a pair of horses at front and a cloth cover over the wire frame, and it would had a come in a box titled "Prairie Wagon," made in Japan.  I rather like it in its current distressed condition better, giving it the ability to serve as a platform for the display of some other tiny thing--and, happliy, the little wooden cutout driver (with painted red hat, blue sleeve, green pants...and black face???)) is still firmly in place! 

4 3/4" long x 1 7/8" wide x 2 3/4" tall. Well worn but stable and sound; the front wheels turn slightly from side to side so may just slightly loose but are still firmly attached.