Mactracker provides detailed information on every Apple Macintosh, iPod, iPhone, and iPad ever made, including items such as processor speed, memory, graphic cards, supported OS versions, price, storage, and expansion options. Also included is information on early Apple systems, Newton, Apple TV, Apple Watch, Apple accessories, displays, printers, scanners, Wi-Fi products, and operating systems. In addition to listing technical specifications, Mactracker allows you to gauge the real-world performance with scores with Geekbench. Here are a few screenshots of the app on Mac, but it is available on MacOS and iOS.
You can choose any major Apple product since the Apple I from this list.
You get the current estimated value of the Mac you are looking at and can click the icon to hear the startup sound, along with many other details.
You can see your current model, serial number, and type all from the models menu, and add more depending on the devices you own.
It even includes software and accessories.
Hope someone finds this useful like I did!