Hey guys, if you don't mind I'll contribute to the DBC history a bit too. I'll start with a quick background. 4 years ago I had a very stupid idea. When I was a child I always wanted to have a Casio calculator watch but we could not afford so 4 years ago I thought it would be cool to have 1. Then I thought maybe I could have all of them because I thought there may have been only 3-4 different variations out there from Casio (considering the different memory capacities as one). Well I could not have been more wrong couldn’t I

. I started with my childhood dream, the DBC-62. I found 1 in my country pretty cheap thanks to a very nice guy who saw that I honestly wanted 1 not just to resell so he sold me at a really low price. Thanks mate! Then I accidentally found out on eBay that Casio made some “special ones” with images visible when the EL is on. Though again it would be really unique to have all of them since really how many could be out there, 3-4!? After collecting them for 4 years now I know my estimation was out by 1 order or magnitude and in fact no one really knows how many there are. My post is about these watches.
Below are some images of my current collection:
Above image shows a few other watches too but now I'd like to focus only on the "special" DBCs, namely:
- Cognit Schema - I have 6 - see below number 1-6
- Dino Zone - I have 9 - see below number 7-15
- There is 1 tricky one, no. 15 - looks Casio made with the same image a Micro Cosmos version too. I do agree that this could be either a dinosaur or a microorganism, don't have any details why Casio did this, I think it looks more like a flying dinosaur so I bought the Dino Zone
- 1 important note, no. 11 is not with the original band + case, someone implanted the background image to a DBC-150, at some point in my life I'll buy the one with original case+band but I spent enough money on this already so rather let things calm down a bit

- Micro Cosmos - I have 9 - see below number 16-24
- Mondo Style - I have 5 - see below number 25-29
- Special-special ones
- I have 10
- Postpet - I have 1 watch with original box - the collector I bought this from said there were only 300 ever sold - according to some Japanese site Postpet was an e-mail client + a Tamagochi like software - see below number 30
- Sophia - I have 1 watch with original box - this is a special collaboration with a Japanese band Sophia (source of the information) - see below number 31
- Dancemania - 1 watch - according to the source this was one of the prize on a dance competition held in Japan - this has a very unique metal box which I don't have unfortunately, no one knows how many are out there (source) - see below number 32
- Data bank with lightning symbol - 1 watch - there are 2 known variations with the same background symbol, 1 with white band and case, 1 with black - see below number 33
- Disney - 1 watch - see below number 34
- Hysteric Glamour - 2 watches (+ I have 1 spare) - this is a fashion brand - looks Casio made a collaboration with them - I have 1 original box too - see below number 35-36
- Jigsaw Menswear - 1 watch - there are 2 known variations with the same backgorund symbol - Jigsaw is a fashion brand in the UK, according to source this watch was a collaboration between Casio and Jigsaw when they opened a branch in Japan, I contacted them 1 year ago asking for information but they could not tell me anything about this watch (source) - see below number 37
- Kermit the Frog - I have 2 watches both are the same - according to the collector I bought this from there were only 1000 ever sold - see below number 38
- PPFM - I have 1 watch - PPFM is a fashion brand in Japan - see below number 39
Speaking of rarity here is my opinion:
- Dino Zone: most of them can be easily obtained except no. 15 which is really rare
- Cognit Schema: no. 4 and 6 are rather rare, no. 1 is not that common either, the others can be purchased easily
- Micro Cosmos: I would say no. 24 is a bit rare but in general they can be purchased easily (however note no. 15 is also sold as Micro Cosmos and that one is really rare)
- Mondo Style: I would say a bit difficult to get all of them especially because no one knows how many are out there, on top of it Casio chose to use a terrible quality silicone band for these which breaks over time, eg. for no 27+28 I don't have the straps either and it is extremely rare to find one with "healthy" bands
- Special-special ones, Disney + the lightning ones are relatively easy to get but the others are extremely rare, I would say the most difficult one to get is the Jigsaw, I have never seen this on eBay, mine was purchased in Japan but again all of them are extremely rare. Sophia shows up once per year, Hysteric Glamour is the same, I saw PPFM on eBay only once in the last 4 years as well as Postpet
Here are the individual watches with the EL on:
Cognit Schema
Dino Zone
Micro Cosmos
Mondo Style
Special-special ones
Boxes