You're welcome - I should also probably add that as a pre-war toy, this probably has about multiple times the amount of lead in the paint that modern toy safety regulations allow! I'd definitely recommend accidentally hiding it and buying him some Hot Wheels instead!
The tyres are the original ones, I think, and frequently go soft and develop flat spots over time. Also, take care with the front wheels, as the hubs look to have metal fatigue (visible as the fine network of cracks all over them). This is common in pre-war Dinkies, and is due to impurities in the metal used. Over time, this cracks and crumbles, so the wheels are quite fragile. This should not affect the value, however, as pre-war Dinkies are so rare, and this one really is in amazing condition body and paint-wise.