Here's a list detailing all of the Concertmate keyboards released by Radio Shack and their Casio equivalents placed next to them for quick and easy reference. The list is by no means exhaustive, but I'm hoping that will change as it grows and has new models added to it over time. If there are any I have missed or you are able to identify any of the models I've placed a '#' next to, then please post them below so I may add them to the existing list.

Here goes...

Concertmate 200 - Casio VL-1/VL-Tone

Concertmate # - Casio VL-5 (Unconfirmed)

Concertmate # - Casio VL-10 (Unconfirmed)

Concertmate 300 - Casio PT-1

Concertmate 350 - Casio PT-10

Concertmate 360 - Casio SA-9

Concertmate 370 - Casio SA-8

Concertmate 380 - Casio SA-5

Concertmate 400 - Casio MT-35

Concertmate 410 - Casio # (Unidentified)

Concertmate 450 - Casio SA-20

Concertmate 460 - Casio SA-39

Concertmate 470 - Casio SA-35

Concertmate 500 - Casio SK-1

Concertmate 570 - Casio # (Unidentified)

Concertmate 575 - Casio CTK-40

Concertmate 580 - Fujitone 6A

Concertmate 600 - Casio MT-100

Concertmate 650 - Casio SK-5

Concertmate 660 - Casio CA-#

Concertmate 670 - Casio CA-100

Concertmate 680 - Casio MT-205

Concertmate 690 - Casio CTK-80

Concertmate 700 - Casio MT-207

Concertmate 750 - Casio MT-140

Concertmate 800 - Casio SK-8

Concertmate 900 - Casio # (Unidentified)

Concertmate 950 - Casio # (Unidentified)

Concertmate 970 - Casio CTK-480

Concertmate 975 - Casio CTK-485

Concertmate 980 - Casio CTK-511

Concertmate 990 - Casio CTK-601

Concertmate 1000 - Casio CT-700

Concertmate 1100 - Casio CT-# (Unidentified)

Concertmate 1500 - Casio CT-# (Unidentified)

Concertmate # - Casio SK-60 (Unconfirmed)

Concertmate MG-1 - Moog/Mini-Moog

Concertmate CT-1 - Casio SK-100 (Unconfirmed)

Concertmate CT-2 - Casio SK-200 (Unconfirmed)

Realistic Rap-Master - Casio RAP-1/RapMan

--

Radio Shack MD-500 - Casio # (Unidentified)

Radio Shack MD-501 - Casio # (Unidentified)

Radio Shack MD-981 - Casio # (Unidentified)

Radio Shack MD-982 - Casio # (Unidentified)

Radio Shack MD-992 - Casio # (Unidentified)

Radio Shack MD-1121 - Casio # (Unidentified)

Radio Shack MD-1150 - Casio CTK-550

Radio Shack MD-1160 - Casio CTK-551

Radio Shack MD-1210 - Casio CTK-651AD

Radio Shack MD-1600 - Casio CTK-558

Radio Shack MD-1700 - Casio WK-1600/1630

Radio Shack MD-1800 - Casio WK-3000

Radio Shack MD-4072 - Casio WK-3200

Once again... Please feel free to post details of any other Concertmates you know of that are not in the list or are still, as yet, unidentified and I will add them

*Any entry marked as 'Unconfirmed' means there is not enough evidence to determine the model name or model number of the Radio Shack equivalent. Such models are likely to be prototypes or released in limited numbers making them so rare that only a handful of people ever remember seeing them, let alone owning one!*