The first I purchased from Richard Friedberg in 2015:

The second I purchased from Eric Jackson this past January:

And now a third example, found at COMPEX yesterday. Two strikes from the ship HENRY CHAUNCEY and five strikes from the ship RISING STAR. This is the only example I’ve seen that has cancels in two different color inks. The vast majority of Pacific Mail Steamship Co. straight line ship cancels are stamped in blue ink, but the RISING STAR is one of two ships from which I have seen cancels in red ink.

The manuscript initials match another example I have from the ship HENRY CHAUNCEY:

P.S. If anyone has any other examples of multi-ship strikes, I would like to start compiling a census of those pieces and would appreciate high resolution images to include. Thanks.