hmt SONA Handwind (Citizen Licensed Caliber) 17 Jewels
The band is probably quite OK to wear however
the factory provided spring bars where too thin for the lug holes. Another discovery made after 8 years of owning them. When I moved the watches while photographing them, I noticed that the springbars' diameters were roughly that of the drilled through lugs. They slid right through the lugs and out.