The Constellation is at the
Aviodrome in Lelystad. Plans are to have it flying again next year. They had some problems with engine no.3 which had just been replaced when the photo posted above was taken, the spinner had obviously not been replaced yet.
Indeed Air Atlantique have a
DC-6 in KLM colours (G-APSA as mentioned by Conc), it was painted in this scheme for filming work about the
1953 London - Christchurch Air Race but will remain like this for a while and might also visit some shows next year.
The half KLM half Air France DC-3 is PH-PBA which is operated by
DDA Classic Airlines alongside PH-DDZ in Martinair colours. The half/half colourscheme was used to commemorate the first DC-3 flight between Amsterdam and Paris last year. A
French DC-3 (F-AZTE) was painted in the same scheme then as a standby and might still be in these colours (including fake PH-PBA markings!).