Extremely rare factory-sealed IBM Personal Computer AT Model 5170 Store Controller from 1986 - a genuine piece of computing and retail history in pristine, never-opened condition. This is NOT a standard IBM PC AT, but rather the specialized Store Controller variant (likely Model 839 or 899) designed specifically for the IBM 4680 Store System to manage IBM 4683 Point-of-Sale terminals.What Makes This Special:

• Factory Sealed & Never Opened - Original IBM box with factory tape intact
  
• Store Controller Variant - Rare configuration for retail POS system
  
• Complete NOS (New Old Stock) - Includes all original components
• Historical Significance - From the golden era of IBM computing (1986)
  

System Configuration:

• Processor: Intel 80286 (6 MHz)
  
• RAM: 512KB onboard
  
• Storage: Dual hard drives (20MB or 30MB configuration typical for 839/899 models)
  
• Floppy: 1.2MB 5.25" high-density drive
  
• Bus: ISA 16-bit with 8 expansion slots
  
• Special Hardware: Store Loop Adapter for IBM 4683 POS terminal connectivity
  
• CMOS RAM: Battery-backed configuration storage
  
• Real-Time Clock: Motorola MC146818
  

Box Condition Notes:The original IBM shipping carton shows honest age-appropriate wear consistent with 39 years of storage. The box exhibits minor corner wear, some surface scuffing, and age-related discoloration of the packing tape, but remains structurally sound. The critical factory seals are intact - this system has never been opened or powered on since leaving the IBM factory in 1986. UPS C.O.D. tag and IBM warranty stickers are present and original.
Historical Context:The IBM 5170 AT (Advanced Technology) revolutionized business computing when introduced in August 1984. The Store Controller variants (Models 839 and 899) were introduced in January 1986 specifically for the IBM 4680 Store System, capable of controlling up to 64 IBM 4683 Point-of-Sale terminals via store loop connections. These specialized systems were the backbone of retail computing in the mid-to-late 1980s, managing everything from cash registers to inventory systems in major retail chains.
Compatible Systems:

• IBM 4680 Store System (Version 1, 2, 3, 4)
  
• IBM 4683 Point-of-Sale Terminal (Models 001, A01, xx1 series)
  
• IBM 4684 Point-of-Sale Terminal
  

Compatible Peripherals:

• IBM Store Loop Adapter
  
• IBM 4683 POS Terminals (up to 64 units)
  
• IBM Enhanced Keyboard (84-key or 101-key Model M)
  
• IBM 5151/5153/5154 Monitors
  
• Various IBM expansion cards
  

What You'll Receive:Everything exactly as IBM shipped it in 1986 - the complete system in its original factory-sealed box. Based on visible markings, this includes the computer unit, original IBM packaging materials, and documentation. The system has never been opened.
Perfect For:

• Serious vintage computing collectors
  
• IBM historians and archivists
  
• Museum exhibits
  
• Investment-grade vintage technology
  
• Retail computing history preservation
  
• Technology education programs
  

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