Vintage 1950's /1960's Slaters Wagon Kits No. 4035 Gloucester 6 Plank PO Gloucester Wagon - In The Original Box - Shop Stock Room Find. Released by Slaters Plastikard Ltd in the 1950's/60's as part of their series of 4mm scale 00/EM/P4 models. This fantastic Slaters Wagon Kit is kit No. 4035 and features the Gloucester 6 Plank PO Gloucester Wagon in 4mm scale - 00/EM/P4 gauges and is a finely detailed plastic model kit with full assembly instructions. Shop Stock Room Find, Discovered in the store room of a closed down shop with a whole host of other model kits from a similar era. Some very very minor signs of shelf wear on the tips of the corner edges, but otherwise perfect, and the contents remain sealed in the packet.. All Orders received before 4.00pm Mondays to Fridays are dispatched the same day.