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):

select

count (object_ID) as NumberOfSP

, right(name, 7) as VersionNumber

from sys.objects

where type = 'P'

group by right(name, 7)