Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

The B30 was produced for a long time, and there are several differences in the standard factory Productions.
Like the water gauges for instance, there are models who have the upper and lower connections strait to the vertical face of the boiler.
Others have the upper connection to the vertical face of the boiler and the lower connection to the underside of the boiler and is connected by a U pipe to the glas gauge.
Why in time these small changes where made, I can't give you a direct answer to.
Is there a chronological pattern when these changes where made?
Probably.
I think the main reason was that it all was done for cost effectiveness.
My dad once told me story, he worked his whole career at the Ford factory, one day they discovered that the could keep something together with 3 in stead of 6 screws.
What a cost effectiveness do you think this makes to a firm, les labor, less material etc..
And I assume that this will also be the case why these minut changes are made over time.
Probably, but to my knowledge there is no record left that tels us when or why these minor changes where made.
This is only one detail I pointed out, probably there are many more minut changes in other places of the engines over time.
I hope this answers your question a little bit…

Cheers,
Danny