Latvian license plate: Dealer (documented since 2010)

Format, years and the law

Format: A9999, for example A1606 (9 any digit)
The format above follows the issuing rules: a registration that fits it is one this series could have issued.
Years issued: Documented since 2010; the format is likely older than the first year documented. Still issued.
Vehicle class: Dealer: trade/garage plates bound to a business, not a vehicle. Issued for car, van, truck, bus, motorcycle, and trailer.
Colours: Characters #D0021B Background #FFFFFF
Size: 520 × 110 mm · every country's size

Dealer 240×130 mm

dealer · 240 × 130 mm
About this plate: THE TRADE PLATE (tirdzniecības numura zīme), and the most information-rich Latvian mark: its first character encodes the vehicle type and its last digit encodes the expiry year, so a single trade mark carries both a class and an era. The vehicle-type meanings of A-E are NOT in the annex and no decode is shipped for them, a narrow, well-located gap.

7. pielikums 4.2.1-4.2.3 https://likumi.lv/ta/id/222145-transportlidzeklu-registracijas-noteikumi
4.^1 panta ceturtā daļa, trade-plate requirements delegated to the Cabinet https://likumi.lv/ta/id/45467-celu-satiksmes-likums

The series id is lv-dealer. The API returns its format, validation, colours and designs with the rest of Latvia's series:

curl -s https://vehiclesdb.com/api/v1/plates/lv \
  -H "Authorization: Bearer $VEHICLESDB_API_KEY" \
  | jq '.series[] | select(.id == "lv-dealer")'