Related Clues:
- Global time standard
- London clock setting (Abbr.)
- Astron. clock setting
- Cousin of VAT
- Astronomer's calculation: Abbr
- Setting at 0 degrees long
- Prime meridian setting: abbr
- Letters that clocks are set by
- BBC std
- Clock-setting standard: Abbr
- A kind of VAT
- Acronym for tax collectors
- BBC World Service std
- Clock setting standard (Abbr.)
- Prime meridian zone, briefly