I have puzzled for hours over these sets, I feel there may have been a mix and match type system going on with Walther and some of the sets. So pick your own Roland tray and add certain types of sticks and pots maybe?
There appear to be two types of Mary candlesticks 1936 and 1937. I can't find the catalogue link for 1936 any more, but Anne mentioned Pamela's example above,http://www.pressglas-pavillon.de/kerzenhalter/00769.html
and here is the link to 1937.http://www.glas-musterbuch.de/Walther-1937.76+B6YmFja1BJRD03NiZwcm9kdWN0SUQ9MzE0NCZwaWRfcHJvZHVjdD03NiZkZXRhaWw9.0.html
I have pictured my Mary candlesticks below, they measure 15.5 cm and 17.5cm tall.
I have seen the same pink set as yours listed on Ebay Christine, but with the 1936 candlesticks, also a green set with 1936 candlesticks and 2 decanters.
I've also seen a Frosted Pink and Frosted Blue set with the 1936 candlesticks, but with an oval tray, the oval tray has the same type of scalloped edge as your tray.
In fact I have my own set with the oval tray and pots in clear (actually I have 3 trays goodness knows why
) and yet it doesn't appear to match the catalogue sizes for a Roland oval tray, although the pattern matches and the glass is also quite thin and lightweight not much like the glass in either of the Mary candlesticks in my pics 1 and 2, but that could be my imagination.
There is an entry for a Mary Pot in the 1937 cataloguehttp://www.glas-musterbuch.de/Walther-1937.76+B6YmFja1BJRD03NiZwcm9kdWN0SUQ9MzIzOSZwaWRfcHJvZHVjdD03NiZkZXRhaWw9.0.html
I've seen another type of Mary pot in a catalogue somewhere also, but for the moment it evades me, and it's not like yours or my pots.
Also an entry for the Roland flat lidded pot as mentioned by Anne in Cloud glass, in the 1933 catalogue named as a Powder Pothttp://www.glas-musterbuch.de/Walther-1933.34+B6YmFja1BJRD0zNCZwcm9kdWN0SUQ9MTIzNSZwaWRfcHJvZHVjdD0zNCZkZXRhaWw9.0.html
Also the tray that looks like yours in the 1933 catalogue http://www.glas-musterbuch.de/Walther-1933.34+B6YmFja1BJRD0zNCZwcm9kdWN0SUQ9MTI2NCZwaWRfcHJvZHVjdD0zNCZkZXRhaWw9.0.html
comes in 3 sizes, do you know the measurements of yours?