Keeper Steven Davies made his debut for Worcestershire back in 2005
England national selector Geoff Miller was given a lot of food for thought on a rain-reduced second day at New Road.
England one-day keeper Steven Davies hit 112, showing why not only Surrey are keeping tabs on him as he completed his second Championship ton of 2009.
Then Yorkshire's Michael Vaughan made a good start in his final bid to stake a place in England's Ashes squad.
The former England skipper made an unbeaten 21 off 34 balls out of 55-1 in reply to Worcestershire's 415 all out.
It was the perfect way for Davies, who was on Tuesday revealed to be the subject of 28 days' notice of approach from Surrey, to celebrate his 23rd birthday as he helped his side claim maximum batting points for the first time this summer.
After resuming on 319-5, out of which he had been not out overnight on 75, his efforts helped Worcestershire pile up their highest total of the campaign.
Ashley Noffke helped add 81 for the sixth wicket in 22 overs before being trapped leg before on 35 by Ajmal Shahzad.
Davies then brought up his hundred - made off 152 balls with 13 fours - with a square cut to the boundary off Matthew Hoggard. But, after making 112, he nibbled at a leg-side delivery from Deon Kruis and was caught behind.
Worcestershire had reached 385-7 when rain then held play up for nearly four hours. And, on the resumption, the Tykes quickly mopped up the remaining three wickets.
Mason then had Jacques Rudolph caught behind to bring Vaughan to the crease - just days before the initial 17-man squad to face Australia in the first Test at Cardiff is announced on Monday.
As a centrally contracted player, 34-year-old Vaughan is expected to be in that squad, despite managing just 104 runs in his previous six championship innings this season.
But, after taking nine balls to get off the mark, he did at least take his chance to justify Miller's watchful presence.
Cashing in on some uncharacteristically loose bowling from Mason, he struck five boundaries in his 21, helping Joe Sayers (25 not out) add an unbroken 40 before rain intervened with 13 overs remaining. And, weather permitting, the stage is now set for him on Thursday.
Worcestershire's director of cricket Steve Rhodes told BBC Hereford and Worcester:
"I thought Davo played wonderfully. Although he got dropped a couple of times, he really does hit the ball sweetly.
"There were some tremendous shots there and it was very exciting to watch.
"He has played some very good cricket over the past two or three years and I am delighted with the way he is playing."
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