I want to us this info for a AU presentation and want to make sure it’s pretty accurate. According to the stable releases you can download, the first one was: 2013-10. If this is correct, do you know what version of Revit it was supported for?
Hope it contains the information you were after, but for continuity this is Revit Dynamo… I do not know if Sandbox/Standalone-Dynamo was there before… I do not believe so but I’m not sure.