Description
For sale is a vintage IBM 4381 MCM Multi-Chip Module, a ceramic multi-chip module from an IBM mainframe system

This is a collectible vintage computing component with the distinctive blue IBM MCM heatsink/module design. It is best suited for display, collection, restoration reference, or educational use.

Important condition notes:

• Untested.
• Sold as a collectible/display item.
• I cannot verify functionality.
• Not sold as a complete IBM 4381 system or as a modern working CPU.
• Please review all photos carefully for exact cosmetic condition.
• You will receive the exact item shown in the photos.

The module is in excellent condition and the pins are good and protected by the factory plastic cover.. I have not cleaned or modified it. Because this is vintage electronic hardware, it should be handled with appropriate ESD precautions.

What’s included

• 1 × IBM 4381 MCM multi-chip module, as pictured

Shipping
Item will be carefully packed in anti-static protection, cushioning, and a rigid box. Insurance and tracked shipping are recommended due to the collectible nature of the item.

International buyers
Import duties, taxes, VAT, and customs fees are the buyer’s responsibility. Customs forms will be completed accurately; the item will not be marked as a gift.

Returns
No returns for buyer’s remorse due to the vintage and untested nature of the item. eBay Money Back Guarantee still applies if the item does not match the listing description.