French silversmith's mark, need help identifying.

[lavenderhoney]

Hello all. I found this French .950 silver tumbler hallmarked with a Minerve 1titre mark. But I cannot identify the silversmith (orfèvre). The small lozenge shaped mark portrays an animal in the center, perhaps a wolf or a lamb, I cannot tell. Together with two letters with the letter F being at the end. I cannot make out the first letter. Your help would be much appreciated.
Photos below:

http://i1227.photobucket.com/albums/ee4 ... pixel1.jpg
http://i1227.photobucket.com/albums/ee4 ... 900px2.jpg

(admin photo edit - images too large - link only - see Posting Requirements )

[Zilver2]

Hello,
This is the maker's mark of silversmith Prosper Ytasse & F
17 rue Réaumur, Paris
N° de garantie : B880
N° de préfecture : 11286
Symbol : a sheep
Mark entered : 27 January 1897
Robert

[lavenderhoney]

Thank you so very much for taking the time to help me find this silversmith, I truly appreciate it. Have a wonderful day!