"20 FR L 1935 B"
The reverse features the Swiss coat of arms on a shield, with an oak branch on each side and with acorns and ribbons behind.
L = Lingot (Ingot)
B = Swissmint in Bern
"HELVETIA"
The obverse shows a profile of Helvetia, the female personification of Switzerland, facing left. She has braided hair and wears a wreath of edelweiss flowers around her shoulders, with the Swiss Alps in the background. The word "HELVETIA" is inscribed above her head, and the designer's Fritz Ulysse Landry signature, "F. Landry," is visible on the lower right edge of her shoulder.
From 1897 to 1935, the edge has 22 raised stars representing the swiss cantons. They are in three groups, two of seven and one of eight stars.
The name Vreneli, by which the most famous Swiss gold coin is known, is an affectionate diminutive of "Verena," the female figure who personifies Switzerland (Helvetia) and who appears on the obverse of the coin.
The picture is just an example. We could also have available coins with other dates.