the bezel applied with a rose- and circular-cut diamond-set Imperial eagle, the shoulders cast with dates 1613 and 1913, struck with workmaster's initials, 56 standard, scratched inventory number 4177,  in original red leather presentation case

Impressive and in excellent condition, with only minor surface nicks and scratches.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."

The official tercentenary celebrations of Romanov rule were scheduled for 21-24 February 1913, but the preparations for the lavish event began three 🐬years earlier in 1910.  A special committee was set up to oversee the organisation of the festivities across the cou𝐆ntry. 

To commemorate the occasion, various medals,♔ coins, stamps, postcards and jewellery were produced featuring the Imperial eagle, number "300" and dates "1613" and  "1913".  The best jewellers of the time were commissioned by the Imperial Cabinet to produce a number of gifts to be presented by the Emperor and other Imperial family members to various officials, dignitaries and civil and military personnel.  Nearly all such objects were presented in red leather boxes embossed with the Imperial eagle.

Only a very small number of tercentenary rings were produced by Fabergé; the archival documents of the Imperial Cabinet list only six such 🅷;examples, which were presented to the engineers Komarsky and Nagorsky, the nobleman A. Bartran, the civil servant A. Melnikov and the officers Kirpichev and Bauchisaritsky.

An identical example by the same workmaster was sold, Christie's New York, 11 April 2003, lot 126.  Please see also U. Tillander-Godenhielm, The Russian Imperial Award System, 1894-1917, Helsinki, 2005, pp. 196-197.