Extraphone is a Russian record label ran by «РАЙС ЛисС» corporation. It's catalogue number always follows a pattern
where YY are last 2 digits of release year, NNN is a 3-digit counter for releases. It's generally sequential, but with quite a few jumps in the sequence.
Extraphone maintains their catalogue in a relatively good shape and it's available for the reference at http://www.extraphone.ru/files/Extraphone_catalogue_2012.xls