This series appears to be a 1965 revival of the earlier title. The earlier series began with Western Picture Library (Pearson, 1958 series) #1 and ran for at least 92 (weekly?) issues until 1961/62. This title is not listed in Denis Gifford's The Complete Catalogue of British Comics (Webb & Bower, 1985). Limited internet data suggests that there might only be two unnumbered issues of this series.