The Royal No. 10 was introduced in 1914 and only early models like this one have the wonderful Double Beveled Glass Windows on each side. This one could date from 1914- mid 20's. Having round glass keys, front strike, four bank keyboard. and high gloss black finish. The windows on the sides allow the user to observe the inner workings. Condition very good, all of the keys and other functions work well, a couple keys come down slower than other, has been in use recently,black finish and decals very good, may need a mild cleaning. 10" x 11" x 16". Hard to find one in this original good condition.