Yes, I see what you are talking about. I must concur. I think you nailed it.
Hmmm, you make excellent points. The compass opening is clearly Navy. I don't know if Boeing made the Stearman with naval instrument.You will notice in the mystery panel and the Stearman panel that the second row of instruments are farther outboard than the lower instruments. In the J2F panel they are vertically above the lower row. The J2F has 6 instruments, the mystery panel and the Stearman panel have 7 instruments.