This is a Liverpool FC players away match worn shirt from the 1991-2 season. Its got all the differences from the replica, and more info here on this great site documenting the history of Liverpool jersies. What’s interesting about this is that the 13 in this era was more than likely worn by a member of the backroom team. There is a lot of use and stains so probably used in friendlies as well.
Graeme Souness wearing the same style shirt (note Football League badges) during a pre-season friendly in 1991.