The old Mastermind game I remember was a small case that was made of hard plastic that was brown colored. I think it looked like the one in the picture below from gamesmuseum.com:
I vaguely recall two sizes of this game: the regular pocket-sized model and the jumbo one (well it looked jumbo to me at that time!)
Anyway, a few months ago we went out to buy the game. I guess after describing the game and how much I enjoyed it, the kids wanted it too. Frankly I didn't think we'd still find it. After going through Southmall's Toy Kingdom and Festival Mall's toy shops, we chanced upon it in MindWorks at Festi for Php400. Here's the box of the Mastermind we bought.