Yes, it is possible to create a branch from any revision. First, review the following help command:
svn help copy
-r [--revision] arg : ARG (some commands also take ARG1:ARG2 range)
A revision argument can be one of:
NUMBER revision number
'{' DATE '}' revision at start of the date
'HEAD' latest in repository
'BASE' base rev of item's working copy
'COMMITTED' last commit at or before BASE
'PREV' revision just before COMMITTED
To use this command in practice:
svn copy -r123 http://svn.example.com/repos/calc/trunk http://svn.example.com/repos/calc/branches/my-calc-branch
In this case, "123" is the revision number from which you want to create a branch.
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