IRBIT: 1874-1913, a valuable and representative collection (over 250) including 1874 2k. black on lilac-rose (15, with a block of six), 1880 2k., 4k. and 8k. a good range with multiples (incl. pieces ex Fabergé and Ferrari) and four covers, the 1883-85 Third issue is well represented with complete sheets and several covers and later issues include a few proofs and varieties