The SP025617 is a little known, hard to find variant of the SP0256 speech synthesizer family. I was able to find a small quantity of these and don't expect to find anymore. Order now.
SP0256-17 Word List
Oh
Eighteen
One
Nineteen
Two
Twenty
Three
Thirty
Four
Forty
Five
Fifty
Six
It is
Seven
A.M.
Eight
P.M.
Nine
Hour
Ten
Minute
Eleven
Hundred Hour
Twelve
Good Morning
Thirteen
Attention Please
Fourteen
Please Hurry
Fifteen
Melody A
Sixteen
Melody B
Seventeen
Melody C
SP0256-17 Datasheet (pdf)