IMpossible to answer without a detailed description of all markings, box, papers, accessories, caliber, maker, finish, condition, etc..
100-300 or so
hi depending on condition and grade your looking at £600 to £1300
sk sks sk sks ks k
sk = skip
SK is most often used for mailing addresses, etc...
173 k
SK stands for sketch
Mariehem SK was created in 1974.
Perstorps SK was created in 1925.
SK Rapid ended in 2011.
Güneş SK was created in 1935.
Güneş SK ended in 1938.