R P (the letters R and P under a tilde, three globules in a triangle to the right of the letter P).
AVT _ TRA _ NO (inscribed in three lines, the letters T, R and A with the letter A tilted, a line above and a line below the same letters; one globule to the left of the letters N and O).
Photo of a coin sold by cgb.fr, link to the sale and their website: https://www.cgbfr.com/pepin-ier-dit-le-bref-denier-ttb,bca_390054,a.html.
Coin in the name of the Auttramnus.
|N°||G||F||XF 40||AU 58||MS 63||MS 65|