This vintage calculator is an essential accessory for any Cadillac owner. The insert fits perfectly in your owner/operator manual and will aid in all your calculations. The calculator is specific to Cadillac models from the 1980s and is a rare find for collectors. The literature type is an owner/operator manual and the media type is a calculator. This item is perfect for anyone looking to complete their collection or for those in need of a replacement calculator. Family-Owned, like new condition was stored in the owner's manual in the house. Thinking that's why it's like new working order