Three Waldorf 4-Poles

image via Till Kopper on the Waldorf list.

"Boele, Georg (swissdoc) and Till having fun."

I'm guessing this is one of each.
See if you can spot the differences.

Below are the 4-Poles, Small Stone pedals, and of course the Waldorf Blofeld.

Update via Till in the comments:
"These are 5 (five) small stones. And only two of them are the same revision. Only the two black russians are identically. But soundwise the are all close, but not identically."

Update via Georg aka swissdoc:
"Again some detail on the 3 versions of the 4-Pole, from top to bottom:

4-Pole Beta Unit (Curtis)
This one was used by me during the beta phase back in time, hey, I was using once a postcard to report some bugs to Stefan while beeing on vacation in the "Fränkische Schweiz".

As you can see, the labeling was changed later to fit the features which have been packed in during development.

4-Pole Production Unit (Curtis)
The buttons are swapped, correct. I assume that happened during all the swapping of EPROMs during beta phase.

4-Pole Production Unit (Pulse Filter)
Silkscreening slightly changed here, most important is the change from 9V AC power input to 12V DC. Usefull when you are chasing up one or the other version.

Looks like this version has a green/red LED to show the overdrive status of the gain stage.

Again, we did some recordings, 3 saws from the Blofeld run into the 4-Pole (Curtis vs. Pulse Filter). More on that later plus detail shots from the interior and back of all tree units. Georg."