Probably match worn / issued, but not 100% sure. The Admiral brand was printed and washed out, SFC crest is missing. They used to play in these kind of shirts from time to time. Nummer style and material is official and professionally sown on.
Servette FC
1977 – 1978 Home Player Shirt #11
Match worn / issued by Jean-Yves Valentini
Swapped with a former Grasshoppers player
Servette FC
1977 – 1978 Away Player Shirt #3
Match worn / issued by Lucio Bizzini
Servette FC
1978 – 1979 Home Shirt #15
Official Replica Shirt
With sown on back number
Normally used by Claude "Didi" Andrey
Servette FC
1978 – 1979 Swiss Cup Final Home Player Shirt #19
Match worn / issued during one of the Cup Final matches against BSC Young Boys
Servette FC
1979 – 1980 Home Player Shirt #7
Match worn / issued
Servette FC
1979 – 1980 Home Player Shirt #17
Match worn / issued by Claude "Didi" Andrey
Servette FC
1979 – 1980 Home Player Shirt #17
Match worn / issued
Servette FC
1979 – 1980 Home Shirt #13
Official Replica Shirt
Not the official back number style
Servette FC
1979 – 1980 Away Shirt #13
Official Replica Shirt
Not the official back number style
Servette FC
1979 – 1980 Away Shirt #6
Official Replica Shirt
With plastic printed back number
Servette FC
1979 – 1980 Home Shirt
Official Replica Shirt
Servette FC
1979 – 1980 Goalkeeper Shirt
Official Replica Shirt or a spare player issued shirt