Thanks to all who shared their insights on treating dried and cracked edges on a 1990 Ranch bag.
I decided after bathing her to treat with a paint and conditioner mix my cobbler recommended. While he no longer cleans and reconditions bag, only does repairs, he did offer up some tips.
First, sand the rough areas smooth. Then mix conditioner with the leather refinisher. Medium brown was diluted with the conditioner to give the desired color. I matched it to hangtag.
He warned to make sure conditioner does not contain an alcohol or turpentine that would strip original pigment.
Treating the rough areas first I layered the conditioner/refinisher using an artist paint brush. When it was soaked in or looked less glossy I blended it in to the surrounding area.
Several layers where applied. I could have chosen to fill in the cracks but since leather is pliable I chose to blend in the damage rather than make a scab ( sorry I can't think of better way to say it) of acrylic or glue.
Once the cracks were dealt with the remainder of the bag was treated with the same conditioner/refinisher mixture. It matches the hangtag so I am assuming that the only thing I changed was the "patina" of the leather. I applied this with a moistened make up sponge which was then dipped in conditioner/refinisher mixture.
Finally, when the bag was all dry I gave it several coats of Leather CPR.
Beautiful, thanks for sharing!