To select all SP's with a specific versionnumber:
select * from sys.objects where type = 'P' AND name LIKE '%_268000'
To see all used versions (including how many SP's are available in that version):
** Don't mistake the ‘stupidity of the crowd’ for the ‘wisdom of the group’! **
count (object_ID) as NumberOfSP
, right(name, 7) as VersionNumber
where type = 'P'
group by right(name, 7)