AF26095 Daisho Tsuba: Bushu Ju Masatoshi (NBTHK Hozon Tosogu)

Daisho Tsuba: Floral Design: NBTHK Hozon Certificate
Signature: Bushu Ju Masatoshi 武州住正利

Dai(large):
Length: 7.36cm (2.90in) x 6.96cm (2.74in)
Thickness (Seppa-dai): 0.40cm (0.16in)
Weight: 78g

Sho(small):
Length: 6.83cm (2.69in) x 6.41cm (2.52in)
Thickness (Seppa-dai): 0.40cm (0.16in)
Weight: 93g

Era: late Edo preiod, circa 18th century

Special Feature:
This shakudo tsuba features openwork carvings of various flowers, including sunflowers, peonies, narcissus, and irises, accented with dot inlays. Bushu Ju Masatoshi was a metalworker active during the late Edo period.
I believe the flower depicted in the upper left is a sunflower rather than a chrysanthemum. Sunflowers are said to have been introduced to Japan around 17th century, although they were not particularly popular at first. By the late Edo period, however, paintings depicting sunflowers were being produced.

In Kiri box
NBTHK　Hozon Certificate
Aoi Art estimation paper