I'm very busy now to write new posts but will be some news when I finish the research of some rare devices. Recently, I realized that on my past post of Dewtron lost one image from the Dr. Robert P. Fletcher website. Is my intention to not duplicate information on the web and for that reason I don't copy resources in my blog and usually I put links to the sources. The web is dynamic, some webs are deleted frequently, so then we lost some information, even the archive.org can't catch all and we lost some pictures, maybe I will change my mind and do the same as Matrixsynth, duplicating to preserve the information.
Well, in any case as I saved the picture from Dr. Fletcher website, I've updated the link in the previous post and also posted here:
I've found this ad in the www.secuencer.de website;