As for the "D" sign, I have not been able to find anything so far. I am not sure if it is a traffic sign for cars, or trams. I will keep searching and will let you know if I come across any information that would shed more light on this. In any case it seems to be an "informative" sign and my hunch is that the letter D and the edges were black on white background. I say that, however, without having any evidence so far.
Wow a big thank you guys:
Erwin – your 2nd link even had a reasonable blow-up of the sign itself, perfect. And you anticipated the next headache very well about the font but are you sure it’s Fette Fraktur? See below, I can see it’s very close but compare the small “k” of “klein” & small “s” of “holleschowitz”… I get the impression there are several versions of FF, could you just check if yours is OK before we proceed...
Tom – even better, now I’ve no excuse for getting the accents wrong. I was relieved to see you posted the same link as one of Erwin’s, which I’ve been using since the beginning – “relieved” because I always half-dread an unknown new picture-archive revealing something I’ve guessed or estimated to be totally wrong…& I’m still expecting some battered old Agfa print to show up proving the house was blue.
Jan – your link was extra-useful for the colours of some other signs I have to replicate…which begs the question: What colours were in the V Holešovičkách sign? I’ve been assuming black with white letters but now I’m not sure about anything in monochrome……and my desk-printer doesn’t accept gold cartridges.
The same uncertainty principle colour-wise now applies to the “D” signs, here’s a slightly better shot…
There will be 3 of these in the dio, each has the arrow nailed beneath it although the 4th arrow (pictured on Sept 5th and visible here too) appears on its own, but they’re clearly associated. I don’t know what “D” stands for but these signs look quite new compared to others, which is why I’ve thought they were Occupation. From their positions they seem to be indicating a route (in both directions) rather than anything relating to traffic conditions, but I have an infinite capacity for being wrong