Disney slides/cells/negatives archive or mass produced

[disneyslides]

I have about 12 aprox 4"x4" color slides/negatives/cells that i found in a box with other negatives. these are in brown sleeves with hand written notes, one is a typed description taped to the envelope. these appear to be archival and not mass produced. i put them in an auction before i knew what i had but i still would like to know what they are also some of the hand written envelopes have fantasia stamped on them.