I inherited a 5 strand pearl necklace with the white 14k gold/pearl clasp marked CECIL in the same block letters. It was a gift to my mother from a well-to-do lady from the Phillipines. To hear it might be from Hong Kong rings true for me. This lady traveled extensively and LOVED jewelry.
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Cecil mark on Gold by: Bill Lincoln County Antiques Canton S.D.
Your Cecil mark is most likely from Cecil Arts Jewelry, Alexandra House Hong Kong. Pieces are only marked - Cecil and 14k or whatever the gold content is.
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Paid Opinion by: REBECCA
Hi Michelle
i had a quick search in a couple of my reference books and unfortunately didn't come up with anything under CECIL. We can only devote a certain amount of time for each question. You might like to consider getting a Paid Expert Opinion. Cheers