Saturday’s adapted rules clash was a complete contrast to a meeting between the same two clubs earlier this month at Twomeads. That match, played in horrendous weather, saw just one try as Salcombe won 7-0.
But this encounter, played in perfect weather conditions, produced nine touch-downs.
OPMs made a great start and scored two tries within the opening eight minutes.
First, centre Pete Regan crossed in the right corner and Sammy Matts added the conversion. Then, Jake Aquilina went over in the opposition corner.
But the game then turned and Salcombe scored three times without reply.
Impressive back-row forward Harry Betts got their first, which Lee Clarke converted, before centre John Squires won the race to a kick forward down the right wing. Clarke again added the extras to put the visitors 14-12 ahead.
The Crabs then went 21-12 in front with another converted try by the outstanding Betts.
Yet just when it looked like Salcombe might pull away, OPMs turned the game around again.
Matts scored a try, which he also converted, before Adam Jarrod finished off a fine move to give the hosts a 24-21 half-time lead.
And the second 40 minutes belonged to the Old Boys as they added two further touch-downs.
Paul Roberts managed to beat Salcombe to a kick through for a try 11 minutes after the change of ends before Tom Gigg completed the scoring by going over in the right corner.
Elsewhere, an Ivybridge second string proved far too strong for Devon Merit Table side DHSOB at Cross-in-Hand. The Bridgers triumphed 87-12 on the artificial surface. Lee James and Lewis Jeffery scored for DHSOB.
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