Vintage Metalcasting Instructors Guide AFS Training & Research Institute 1967

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This is a vintage “Metalcasting Instructors Guide” published by the AFS Training and Research Institute (American Foundrymen’s Society). This comprehensive guide, revised in 1967, served as a valuable resource for instructors teaching metalcasting techniques and principles. It is presented in a durable 3-ring binder, consistent with educational materials designed for long-term use and easy content updates. An excellent historical reference for anyone interested in industrial education, metallurgy, foundry practices, or vintage technical manuals. Please refer to images for condition details.

1967 Tektronix Type O Plug-In Operational Amplifier 8 Tubes! For Tektronix 547

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As pictured untested shows signs of use but still in good shape complete all parts, tubes and knobs. All knobs turn as they should and click through all their positions as they should. Stored inside my heated home for many many years. Please message through eBay with any questions before bidding. I believe this is a plug in for a Tektronix Oscilloscope type 547 that I used to have. I gave the scope away but still have the plug in. It may fit other models of those huge scopes as well in the 500 series. Please make sure it fits your scope before buying. All sales final no returns. Shipping from BC Canada. No tariff on this because it’s made in USA.