H-40 (ETA 2834-2 base)

Hamilton's day-date variant based on the ETA 2834-2, sharing the same 80-hour power reserve philosophy as the H-10. The additional day-date complication adds 0.45mm of height over the date-only H-10. Like its sibling, the lowered 3Hz beat rate extends power reserve at a negligible cost to timing precision, and it powers Hamilton's day-date models in the Khaki and Jazzmaster families.