Berkshire 209 all out (56.4 overs) and 280-3 (75 overs)
Wales Minor Counties 1st innings 200 all out (84.5 overs)[/b][b[/b]
Berkshire have built up a lead 289 with Archie Carter (pictured) hitting a maiden Championship century and Michael Williams making a half-century in his first county game at this level.
If Wales had shaded Sunday's play, the second day certainly went the defending champions' way by some margin.
From taking a healthy-looking overnight score of 140-3 to 148, Wales crashed to 200 all out after losing their last seven wickets for 52 runs.
Once again, spinner Chris Peploe weaved his magic for Berkshire, taking 6-66 off 36 overs.
Berkshire's youngest ever opening pair of Archie Carter and Michael Williams, both 18 years of age, put on 97 for the first wicket of the second innings, with Williams being trapped lbw for 57.
Carter and Euan Woods added a further 78 for the next wicket before the latter fell for 43 at 175 and five runs later Richard Morris was bowled for four (180-3 in 53.5 overs).
Carter coolly and calmly stroked his way to a magnificent century off 208 balls in 234 minutes, finding the boundary on 12 occasions.
The Wokingham CC teenager and skipper James Morris have so far put on 100 for the fourth wicket off 127 balls.
Bad light brought the day's play to a premature end with Berkshire on 280-3, a lead of 289, from 75 overs.
Carter has made 114 off 233 balls in 272 minutes with 13 fours, while Morris is on 46, having faced 62 balls with eight fours to his name.
Play on Tuesday will start at the earlier time of 10.30am.