ABUS E20, E30, E60 and E90 keys are used in all kinds of ABUS locks, and especially on doors. Codes are usually written on a card that was originally supplied with the lock, or on the key itself.
Key codes begin with R, followed by a letter, followed by 5 or 6 digits, and sometimes have another letter at the end, e.g. RM002345 S.
Occasionally the code will start with G, e.g. G03592.
Usually same-day dispatch if ordered before 3pm on a working day.