This is the HO Scale Circus Tent Set Model Railroad Building Accessory by Preiser Kg.g.
A complete set of circus tents in one kit. Features 19-1/4" (480mm) diameter big top that's 6-3/8" (160mm) high, plus a transparent insert to protect interior of big top from dust when cutting open for display. Also includes a horse tent, open animal tent, entrance and restaurant tents, baseplate with preformed benches and 18-3/8" (460mm) diameter ring, tent poles, entrance stairways, signs, tent rigging and more. Tents are preformed plastic.