I have been using the forced downtime to become less ignorant about vintage watches, and would appreciate your help in achieving this goal. It would be great if you could recommend articles that informative, well- researched, fun, and helpful to the process picking old pieces in platforms like Ebay. (e.g., no. of units produced of a particular reference, how to be confident in relation to originality, and so on). I am particularly interested in vintage funky chronographs from the late 60s and early 70s. Thank you.