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This model is the Miniature Vehicles (HK) 610-B Weatherall Excavator in yellow and green plastic. It comes in its original green and brown "Matchbox", striker style packaging. It is a copy of the MB24-a.
The model has all detail cast into the main body casting. At the front the grille has been highlighted in silver and the excavator shovel is in green plastic. The side hydraulic arms are also highlighted in silver. There is no interior other than the driver and no glazing.
There is no base, however the underside is marked with "No. 610-B,Made in, Hong Kong" on three lines under the engine area.
The wheels are white plastic, one piece units, mounted on steel axles, domed on one end and crimped on the other. The axles pass through the body casting. The left rear wheel is missing.
Probably issued in the late 1960s or during the 1970s.