[split] f28v

[Searcher]

Upside-down the part on the left looks like the Leo symbol, Leo is a sun sign.

In fact, there is often a red "star" on zodiac depictions of Leo (and the VMS feline has a red splot that looks like candle wax but also somewhat resembles the red suns on a number of zodiac Leos):

For that matter, if we consider the possibility of the IHS inscription, we also can suppose it includes the Leo symbol  in upside-down position, as JKP suggests. But that's not all. The "inscription" equally can be the word "Sol" ("Sun" in Latin, Spanish)  in upside-down or [llikely] reverse position. I don't exclude that the supposed letter "s" can be written in that strange way to depict the Leo symbol, as a sun sign (as JKP pointed earlier). Nevertheless, I also suppose those symbols to be some made-up letters, which can mean Sun / Sol, after all.

   

The picture of the Sun is taken from the You are not allowed to view links. Register or Login to view. (2nd half of the XV c.)