They do have an eagle makers mark but it is not legible.
Sterling Front Cufflinks with a Freemason Symbol from Taxco signed A.L. Eagle 3
Sterling Silver Cufflinks with an A and Z initial by Lamode
Sterling Silver Cufflinks with Etched Design by P&K
Wonderful John Hardy 925 Sterling Head Cufflinks with Black Onyx Dragons
Silver Tone Cufflinks with Case Front Loader by Mercury Industries
Alexander Castle 925 Sterling Silver Celtic Cufflinks for Men - Round 15mm Celtic Trinity Cufflinks with Jewellery Gift Box