Thanks Alan ,if 20th century it is I would guess at early?I’ve got some Arculus shot glasses and they are a brighter glass with little in the way of tooling marks , much thinner and less in the way of air bubbles etc …or as much wear ,the glass has a greyer tone .I’ve gone a bit cane blind on this one !,and just can’t find a match for the central blue canes !?,i don’t think whitefriars for the reasons listed ,so perhaps Walsh Walsh ,the canes seems very skilfully placed .