Hello
Porto mark:
Assayer Alexandre Pinto da Cruz — in use first quarter of XIX century (mark-nr. 2395, p. 249).
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RP« in (__) =
António José Ribeira Pinto (maker’s mark 1586, p. 162) — 1810-1818 (Active in primary half of XIX century [Register of Vicente Manuel de Moura]).
»RP« in [_] with slightly rounded corners, a dot centred above P’s vertical line = silversmith’s name unknown (maker’s mark 2849, p. 305) — 1810-1818
»RF« in (__) = João José Ferraz (1867 by Register of Vicente Manuel de Moura).
Source: «Marcas de Contrastes e Ourives Portugueses» ISBN 972-27-0773-6. Vol. I (XV century — 1887). Reprint 3rd ed. 1997, Lisbon.
Kind regards silverport