The "Sekonic - Master," model L-104, was made under license from Daystrom who owned Weston at this time. It is identical to the Weston Master IV which was otherwise made only in the UK, except for the name on the dial: the Weston says, "Weston Master IV" while the Sekonic says "Sekonic - Master".

Sekonic also sold the meter as a Weston IV in some non UK European counctries.