I took a quick look through some catalogs to see if there were any definite dates listed, but there weren't, but here scans of some of the pages anyway.

Dealers page sent out to be added to catalog No 15, this page is included in No 16 -
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Single page loose insert from catalog No 24 - the other side of this page, 16b, has the "NEW MODEL 1909". In No 24 second edition this is bound in as page 16b and 16a has a large picture of hunting trophy's.
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Gene