Which season did Balenciaga start making coin purses

I'm trying to recall if I'd seen Coin Purses back in SS04 at BalNY..........I know that the Mini Coin Purses were introduced on 03(I think it was 03FW, but I've only seen black in 03 at BalNY), but I'm not quite certain about Coin. I think it was introduced in 04FW(really don't recall seeing Coin before that), but I may be wrong. I didn't pay attention to Coin Purses until I saw one in Eggplant.....:P