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Thanks for your thoughts on this. For my TT one, I stuck to your photos and the RMJ article.
That said, the car in the Bossler book does look interesting; does anyone have any ideas about its origin if it is not a CNJ car? It's on pg 63, btw, not pg 62,, and earlier I referred to the second CNJ series as 17500-17*5*99 ; should be 17500-17999.