Guildline Instruments Limited 6625-20-007-5474 Upgrades NSN 6625014876544 to requirements of AFMETCAL PD 10E-124A-DC-ENB, 6 October 2010, latest Revision. Includes Bridge upgrade, new 6623AF-300A Range Extender, new rack drawer, System Scanners Upgrade, Upgraded Bridgeworks Software, LPT CIS w/IEE