New Ithaca Double commonly referred to as NID, manufactured from 1926 to 1948. Has the distinction of being last double gun manufactured by factory. NID was bolted by a single rotary top bolt. External cocking indicators were standard on all NID models until about 1934, when they were eliminated from the design. Selective and non-selective single triggers and automatic ejectors, were optional at additional costs. Special variation of NID was introduced in 1932 to accommodate 10-gauge 3.5" Magnum ammunition and named appropriately, Magnum 10. All NID guns were available in Grades Field, 1, 2, 3, 4, 5, 7 and Sousa (re-named the $1,000 grade after 1936). Magnum 10-gauge and standard 10-, 12-, 16-, 20-, 28-gauge and .410 bore were offered. NOTE: Like most collectible double guns, smaller gauges command a price premium over 12-gauge model. 16-gauge Field Grade may command a 25 percent price premium; 20-gauge Field Grade may command up to a 50 percent price premium; 28-gauge and .410 caliber Field Grade models, perhaps as much as 250-300 percent. It is recommended that an expert opinion be sought for valuation of high-grade small-gauge models. Of late, Magnum 10-gauge model also commands a price premium. Few of these guns trade and advice of an expert appraiser is suggested. Add $150 for non-selective single trigger; $250 for single-selective trigger; $300 for ventilated rib; $300 for automatic ejectors for grades below Grade 4; $200 for beavertail forearm; $300 for Monte Carlo buttstock.