Hi Dala,
Probably the best way to hinge it would be to have a couple of small tubes fitted to something attached to the boiler and a small tube that is appropriate size to fit between the two small tubes attached to the appropriate edge of the smokebox door. You could then use a pin or similar to effectively make a hinge. Bearing in mind the size maybe you could use some rubber sleeve from a small electrical wire for the tubes? Just suggestions
As for the 'clock hands' on English loco's that is commonly referred to as "The Dart"
Hope this helps...
Probably the best way to hinge it would be to have a couple of small tubes fitted to something attached to the boiler and a small tube that is appropriate size to fit between the two small tubes attached to the appropriate edge of the smokebox door. You could then use a pin or similar to effectively make a hinge. Bearing in mind the size maybe you could use some rubber sleeve from a small electrical wire for the tubes? Just suggestions

As for the 'clock hands' on English loco's that is commonly referred to as "The Dart"

Hope this helps...
Happily collecting things all my life...
