Similar to the connection between Classic H50 and the previous "Hawaiian" detective show Hawaiian Eye with S02E02, To Hell With Babe Ruth, another one has been uncovered between The Guarnerius Caper and an earlier Hawaiian Eye show.

I did mega-anal-ysis of this:

https://fiveohomepage.com/5-0log3.htm#53

Go down to the paragraph which starts with "Just like with S02E02..."