Da stands for Dorthy Alley who died in 1991.
Information comes from her daughter Sandy.
Melton Hotel
Dillon, MT
Est 1897
Same chips have been in play since the late 60's- still using them per Sandy. My guess there have been a few re-orders!!
Would have been illegal until 1973.
The pink is $5, also have a blue 25¢ and a green $1.