Western Australia, Sg 103 (Sc 59): Watermark Normal?

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.

The Stanley Gibbons catalogue notes that the watermark shows crown to the right of CA as seen from the back of the stamp for this issue.

Check the notes under SG 105.

Thanks. I should have mentioned that my edition of Commonwealth & British Empire is 2004: fine most of the time but clearly not always. In this case, it doesn't have that or any other note after SG 105. Time for a newer edition!