For the swan designs with watermark either Crown and CC or Crown and CA, Gibbons says that the normal watermark shows the crown to the left
of the letters when viewed from the back
of the stamp. Or at least Gibbons says this for all series up through the issues of 1882-5. My stamp is from the issue of 1888, for which Gibbons does not say how the normal watermark is oriented. In the scan you can (I hope) see that the crown is to the right
of the letters CA, i.e., to the right of the letters that belong with that crown. (The crown that's most visible to the far left does not belong with the letters that are visible here.)
So, my question: For this stamp and the 1888 series to which it belongs, is my watermark normal? Gibbons includes no mention of any reversed watermark.