Roundlet Corkscrews are one of my favorite types of corkscrew.  They unscrew or pull apart to reveal a helix.  Once the corkscrew extended and perpendicular to the casing, the unscrewed side is reaffixed to create a sturdy handle--many of these are also shown on the silver page, but what they heck, they are worth seeing twice.

La Pierre Sterling, marked with the La Pierre "L   ," and "STERLING"	Redlich Sterling. marked with the Redlich dragon, "STERLING 93," and "1893"	F & B Sterling, marked "F&B, STERLING," and GERMANY on the helix.
1851 Goodyear Patent roundlet	1887 Le Roy Haff's patent roundlet, marked "STERLING"	Leroy Fairchild's 1888 patented sterling roundlet corkscrew, marked "STERLING F,  PAT. APD FOR."
interesting embossed roundlet corkscrew, with gold wash.	Andre Verpillat's 1955 French patent #1104068, marked "BTE S.G.D.G MADE IN FRANCE"	George Wright & Charles Bailey's English patent, marked "REGD JANY 16th, 1873"
Boxwood with bladed worm--unmarked, but I believe this to be made by Le Boullanger.	Benoit Thinet's 1873 French Patent, marked "BREVETE S.G.D.G. PARIS"	Williamson's 1897 patent roundlet, marked "PATENTED JUN 1 97, WILLIAMSON CO. NEWARK, N.J."

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