Might that actually be a re-railer? RC railroad track re-railer / alignment tool - mundobilPerhaps another photo of just 'A'?
There is a Playmobil part, that allows a train to run off the Playmo plastic track onto the floor.. But I think that is both rails, and not individual 'troughs'.
PhilP
I took some more photos of A, though I really had problems getting a good contrast, despite several attempts. The item in the centre is "A" with "B" fitted, it may be coincidental that it is a good fit:Perhaps another photo of just 'A'?
There is a Playmobil part, that allows a train to run off the Playmo plastic track onto the floor.. But I think that is both rails, and not individual 'troughs'.
PhilP
Now that is an interesting pointI wonder if the combination of the two parts, would allow you to join their metal track, to their plastic track?
PhilP