RO34a Bousfield & Poole - Lilac on old paper, good color for this issue (lilac is notoriously poor), lower right corner surface thin, pinhole. Hard to find issue. Please see scans.
If you have any questions, don't hesitate to ask. Thanks for looking, and check out my other Match & Medicine stamps for auction and Buy It Now.
For more information on these fascinating stamps see: http://www.rdhinstl.com/mm/mmb1.htm