The nearest match we can find is "The Abruzzo and Molise Heritage Society of the Washington, D.C. Area" but it's unlikely that they installed the Tosti plaque in London.
This section lists the memorials created by the subject on this page:
Assoc. Abruzzo-Molise, G.B.
Creations i
Sir F. Paolo Tosti
City of Westminster Sir F. Paolo Tosti, K.C.V.O., musician, 1846 - 1916, liv...
Other Subjects
Silvester Schiele
Coal merchant and co-founder of Rotary International.
Edward Victor Robbins
A trustee of Lambeth Savings Bank in or after 1903. We think this might be our man: Edward Victor Robbins: born 1845, in Bermondsey. He lived in Camberwell in 1891 and City of London in 1901. Died...
Friends of Kelsey Park
Kelsey Park is in Beckenham, Kent. The objectives of the group are the conservation and protection of the park’s ecology, plants, animals, birds and its beauty. Its intention is to provide educatio...
Rotterdam 06.11.1982 Dispuut Lustrum
The picture probably wasn't taken at this particular event. You really have to go to the memorial page to have this explained.
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