As per my knowledge, Russian Simonov SKS 1945 collection, should have at least 17 pieces.
Let's see how many SKS 1945 you'd need for a normal collection.
1949 TULA
1950 TULA (Early) Year of production and TULA star are engraved on top received cover just like 1949 one's.
1950 TULA (late) Year of production and TULA star are punched on top receiver cover.
1951 TULA
1952 TULA
1953 IZHEVSK
1953 TULA
1954 IZHEVSK
1954 TULA
1955 TULA (Hard wood stock)
1955 TULA (Laminated stock)
"D" Serie by TULA (Hard wood stock) Star on left side of the receiver
"D" Serie by TULA (Laminated stock) Star on left side of the receiver
"I" Serie by TULA (Hard wood stock) Star on left side of the receiver
"I" Serie by TULA (Laminated stock) Star on left side of the receiver
"K" Serie By TULA (Hard wood stock) Star on left side of the receiver
"K" Serie by TULA (Laminated stock) Star on left side of the receiver
Hope this will help you to complete your SKS collection.