Butterfly, Northwood
Northwood's bonbon has a single butterfly with stippled rays radiating from the center. Most of these have a plain back, but some have fine rings circling the back as shown on the right and are referred to as "threaded."

Hartung Book Two Butterfly, Northwood

Bonbons, plain back or not specified

Amethyst/purple, 15, 20 (both 2020), 20, 30, 60 (all 2021), 20, 45 (both 2022)

Amethyst/purple, electric, 1,700 (2008), 150 (2022)

Green, 20, 25, 30 (all 2020), 15, 30 (both 2021), 20, 70 (both 2022)

Marigold, 10, 15 (both 2019), 15, 20 (both 2021), 15 (2022)

Violet, 60 (2013)

Smoke, 175, 450 (both 1998), 350 (2012), 275 (2018)

Bonbons, threaded back

Amethyst/purple, 110 (2019), 55 (2020), 65, 80, 100, 250, 375 (all 2022)

Blue, 190, 475 (both 2020), 230 (2021), 120, 200, 280, 325 (all 2022)

Green, 150 (2019), 160 (2020), 65 (2021), 170 (2022)

Green, emerald, 1,100 (2000)

Ice blue, 600 (2019), 800 (2021), 650 (2022)

Marigold, 200 (2015), 110 (2021), 170, 325 (both 2022)

Updated 11/22/2022