Please help identify silver hallmark/maker's mark on portuguese champagne bucket

[Gerox]

Hello All,
There is an old champagne bucket, portuguese silver.

The guarantee mark 1886-1938 (Boar and I) excludes 916 silver fineness and the Assay Office Lisbon.
Another hallmark is the letter “F” and the maker's mark is a “lying sphinx above the letter L”.

In addition, there is the brand "1º título" and the brand "LEITAO 8,13".
What do these brands mean?
Is silver fineness 916 or 813?
I'm hoping one of you knows the maker “ a lying sphinx above the letter L”.
As always, any help will be greatly appreciated.
Gerox

[AG2012]

Hi,
This is the mark of LEITAO & IRMAO. Sometimes they use abbreviated form of the mark LEITAO & IR seen in your image.
Compare with this:



They are still in business.
Regards

[AG2012]

Lisbon
1886-1938
Big articles: Boar and Roman numeral I = silver fineness .916

[Gerox]

Lisbon
1886-1938
Big articles: Boar and Roman numeral I = silver fineness .916

Hi AG 2012,
thank you for your quick reply. It is very appreciated.
Great with the manufacturer brand!
Boar and Roman numeral I = silver fineness .916 is o.k., but what is meant with
"1º título" and the brand "LEITAO 8,13", can you help me please?
Best regards
Gerox

[Gerox]

Lisbon
1886-1938
Big articles: Boar and Roman numeral I = silver fineness .916

Hi AG 2012,
thank you for your quick reply. It is very appreciated.
Great with the manufacturer brand!
Boar and Roman numeral I = silver fineness .916 is o.k., but what is meant with
"1º título" and the brand "LEITAO 8,13", can you help me please?
Best regards
Gerox

oh my god what am i stupid.... not "LEITAO 8,13" but "LEITAO & IR" o.k. now I understand it!
Best regards
Gerox