Vintage Resistor Size Charts

[Rontone]

I have some old resistors all mixed up and some brands such as Piher, Electrosil and Beyschlag look very similar, and then Piher resistors change size over time, the 1970s ones are larger than the 1990s, so some of them I'm unsure of the wattage ratings

I've been using the usual size charts available on google image searches and then using eBay listings that post proper measurements and pictures of the box so you can see the date with model/watts etc to get them correct

Anybody know of some official company charts from back in the day or info?