First welcome to the site. Hope you find the information and support you need to be successful in your concours restoration goals. There is allot of information posted already since we've been around over ten years so get comfortable using the search feature and check out the Library as well as the Unrestored Picture Threads. All can often answer questions quicker than posting as waiting. But does not hurt to check to see if something has been learned or added to over time.
To the question -
No San Jose didn't start using them to late 69 and spotty when they did
