This is the Rapido OO Scale GWR Dia. O19 Open C Tube Wagon No.W99925 [964010].

No.W99925
O19 ‘Open C’
BR livery
Sack Truck Door
Separately fitted tie-down hoops
Spoked wheels running in metal bearings
High level of detail above and below the floor line
NEM coupler pockets
1:76 scale, (OO gauge)
UK designed

SKU    964010
Scale    OO Gauge
Type    Wagons
Company    BR (W)
Era    British Railways - Early (1948 - 1956)
Theme    Mainline