Some wonderful pairings. Congratulations to all and thank you for sharing. Mine will pale in comparison but I'll offer this first pair, a Model 10-7 and a Model 64 no dash, both with standard 4" barrels. I call them Night & Day.
This second pair are a Model 10-5 round butt "Felix"and a Model 38 no dash, "Oscar". Better known as the Odd Couple.
For some reason my photos are posting upside down???