Thank youThe book Science of the Kabbalah by Lazare Lenain contains sigils dating back to the 18th Century that are said to be based on the work of Dr. Rudd. Those are the oldest ones I have come across.
The translation of Lenain's book by Piers A. Vaughan also contains Eliphas Levi's seals and the seals created by the Golden Dawn, in case you're interested in cross referencing.
I look forward to reading your work.
Thank you