There aren't very many like that...only the earliest guns, then Ruger decided to add the "All-Weather" to the rollmark. Here's what I've noted on them in the "Reference of Ruger Firearms"...
K77/22RP and K77/22RSP with green stock inserts and without "ALL-WEATHER" rollmark on the left side of the receiver. Known s/n's: 700-69301, 700-69893, 700-70739 and 700-70780 (K77/22RP); 700-68668, 700-69110, 700-70437, 700-71008, 700-71030 and 700-71511 (K77/22RSP). Only 4 K77/22RP and 5 K77/22RSP known of this variety. Note that K77/22RP s/n 700-72897 with green inserts is shown on pages 234 and 235 of "RUGER & HIS GUNS" by R. L. Wilson, but it is not known if this rifle has the "RUGER ALL-WEATHER 77/22" rollmark. Both models in this variation are extremely rare.
Let me know your serial number by PM and I can add yours to the list of those that are known.