Scott Stamp Monthly -- Ireland overprint "gauge"

I recall reading an article in a fairly recent Scott Stamp Monthly about an
acetate overlay that would help to identify the early Ireland provisional
overprints. IIRC, it was being offered for sale by an Irish philatelic
society. I even recall that the article was on an inside left page, toward
the top, and in the first few pages. Does anyone know anything about this?
Or would they be willing to browse through their recent Scott Stamp
Monthlies?

Thanks,

Bob Ingraham

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Bernard Lalor, a lonely Irish schoolboy, wrote home from boarding school in
1890 to seek advice following the purchase ill-fitting boots sold to him
from the "gentleman in Clearys." See his letter and its cover at
http://www.ingraham.ca/bob/dublin.html.
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