I'm curious about the history of the Ludwig P85 strainer. I searched the web and couldn't come up a satisfactory, definitive answer to these questions:

1. When did the strainer first appear? (I narrowed it down to 1969 through process of elimination of specimens online--is that correct?)

2. Did the first version feature the black face? (Once again, narrowing down and process of elimination point to yes, but is that true?...)

3. When did the black face disappear? (Couldn't figure this one out)

4. Did the P85 appear on all of the snares or only specific models? (Once again, couldn't figure this one out)

Thanks in advance!