A request was made via email for larger images than those I previously posted to the Flickr Vandercook group of the ephemera I received with my SP15 no. 23339.
I’ve just completed uploading massive original scans to replace the measly ones previously posted.
Perhaps they can be of some use, though I believe I recall supplying these to our moderator, Mr. Moxon. They may be tucked away on the site here somewhere?