The Ucoin link you gave was for the coin I referenced (KM# 596). This coin https://en.numista.com/catalogue/pieces42617.html is a different one (KM# 588). The picture on the KM# 588 page actually shows a coin with year 27 which is missing from the year lines. However, I'm not sure the picture on the KM#588 page is actually of that coin. The years in Numista match those in SCWC for both coins. Both coins are very similar. I think yours may be the KM#596 one but I'm not sure.
After a little more looking I'm pretty sure the picture in the KM# 588 page is not KM# 588 but KM# 596. SCWC has this statement, "Coins of the eighth series [KM# 588] are readily distinguishable from the ninth series [KM# 596] as they lack the dot or rosette below the inner wreath that appears in the ninth series." The picture on the KM# 588 page has that dot so it is not a KM# 588 and should be deleted from that page. Your coin also has the dot so it is a KM# 596 which does have the 27 year line.