New version of the Solar System Exploration History interactive graphic. With many data updates and corrections. I think I finally have a handle on launch mass vs. dry mass, which is why they appear separately in the mission infos as Mass and Dry Mass, all in kilogram.
I also have pretty complete information about spacecraft dimensions (Dimension:width x depth x height, in meters), or at least pretty good estimates in many cases, measured over maximum extend, including antennas and all. This in turn has enabled me to draw the spacecraft icons more or less to scale in the overview below. And while I was at it, the icon is now displayed on hovering over the timeline.