The Lite-On LTP-305 LED matrices have quite a heritage! They were first developed in 1971 by Texas Instruments, but subsequently have been manufactured by Lite-On.
They're available in two suitably retro colours - red or green - and each display has 5x7 pixels, plus a decimal point.
The matrices can be driven by our Micro Dot pHAT board, with up to 6 matrices in your choice of colours. Or drive them directly from a suitable microcontroller or matrix driver chip like the IS31FL3730 we use on Micro Dot pHAT.
Millicandela rating: 1.6mcd
Required voltage: 2.1V
Dimensions: 0.39" L x 0.73" W x 0.14" H (9.80mm x 18.50mm x 3.50mm)
You can grab the datasheet here.