Josh Morris inspired Treherbert to their first victory in over a year in Division Three South East following their 18-13 success against Penarth.
Treherbert went through the whole of last season without a single victory to their name but Morris made sure this is a fresh start after his sprint for the try-line from his own 22.
Scott Barclay also crossed on a famous day for the Rhondda valley club who had to face a late onslaught from the Seasiders who scored two tries of their own.
And it was a day of drama in the division as Tylorstown edged a thrilling 26-23 win over Heol y Cyw.
The home side scored through John Thomas and a penalty try while 16 points from Julian Pike sealed the victory.
Tries from Richard Howells and Kevin Worgan for the visitors ensured the opening clash went down to a thrilling finale but the hosts came out on top.
Division Three East saw Pontypool United and Abergavenny produced the biggest wins of the day while Pill Harriers and Nelson nicked victories over Tredegar Ironsides and Blaina.
Pontypool United beat Newport HSOB 49-7, crossing the visitors line for seven touchdowns while Abergavenny went one better by running in eight tries against Rhymney to win 47-20.
But the Brewers were hampered when their scrum half was carried off midway through the match with a suspected broken ankle. Jonathan White went over for a brace of tries for the losers.
Ynysybwl hit maximum points on the opening day to top Division Two East following a comprehensive 34-3 victory, 6-0 on try count, over visitors Llantrisant.
Gilfach Goch, Penallta, Treorchy and Llantwit Fardre all also recorded home wins with Rhydyfelin emerging as the sole away victors 24-15 at Abercynon.
Relegated clubs Penallta and Newport HSOB met in Two East and it was Penallta who ran out winners 13-5. In the same division, Mountain Ash earned a losing bonus after running Llantwit Fardre close with a 19-15 scoreline.
When the Wales squad were asked to nominate individuals who played a big part in their early playing days, Wales and Dragons full back and wing Hallam Amos thought of his former Monmouth School rugby coach John Bevan.
Sam Cross and Luke Treharne have been named as co-captains of the Wales Sevens side as head coach Gareth Williams names his 12-man squad to play in the first leg of the HSBC World Series in Dubai next weekend.
Bedwas head coach Steve Law and players Nicky Griffiths and Alun Rees extol the virtues of the close knit club as they prepare to host third place RGC 1404 - who are one place head of them on the Principality Premiership points table - on Saturday.
Many of the Wales squad have said Diolch (thank you) to someone who played an important part in their early playing days by nominating them to be invited to the Wales v South Africa match. One person, Gowerton Comprehensive geography teacher Mr Dean Mason was nominated by two of his former pupils, Dan Biggar and Sam Davies.
The second WRU disability rugby pilot has been delivered, this time in Caerphilly schools, culminating in a festival at the Caerphilly Centre of Sporting Excellence, Ystrad Mynach tomorrow. Plans are in place to set up a Disability Rugby Club in Newbridge to provide long-term playing opportunities.
WRU TV: Hear from inside the Wales camp as Neil Jenkins discusses this weekend's clash with South Africa and how the squad are looking to put in a strong performance to round of the 2016 Under Armour Series