Numbering system used for reserve (bench) players.

Not sure if other countries follow the same numbering system, but it seems that here in SA the following numbering system is applied to reserve players:

Substitutes are usually numbered as follows:

• 16: hooker
• 17–18: props
• 19: second row
• 20: loose forward
• 21: scrumhalf (or second loose forward)
• 22–23: backs

ex Wikipedia

 Blikkies that's good technical shit but missing the point of what's wrong with us...blind as bats...we need an attitude to awake us from our mediocracy and slumber...a huge kick up the ass.