I have the 2010 Daiwa catalogue in front of me. It doesn't show a picture of any identifiable model of Spectron M2 rod. However, those they do show all have a tiny sliver of EVA on the foregrip. There's also an inset picture of an Armlock handle showing a bit of EVA at the butt. I can confirm that your rod has the same SM2-1720 model number as is in the catalogue. The stated recommended lines are also 3-10lb. The catalogue also stated a weight of 10.4oz (Approx 295g), style as being River/Control, rings as being Fuji Alconite and the RRP as £335 (nearly £500 adjusted for inflation). The Spectron M2 range was also in the 2011 catalogue.
In the 2012 catalogue, the Spectron M2 was replaced by the Connoisseur G range. The equivalent 17/20' Connoisseur G had the same specs bar the weight increasing to 11oz (312g). The RRP increased to £375. The Connoisseur G range also happened to include the last spliced tip model that Daiwa produced (unless they've snuck one in without me noticing.
In turn, the Connoisseur G was replaced by the (new) Spectron range in the 2014 catalogue. This incarnation of the 17/20'er was the SPM1720-AU. It weighed in at 10.4oz (295g), had a stated line rating of 2-8lb and had an RRP of £340. This incarnation of Spectron rod was still in the last hardcopy catalogue I have from 2016. IIRC, it may have been succeeded by the Dave Harrell endorsed Tournament RS rods. I know this range included a 15'er and there may have been a 17'er. However, I don't think there was a 17/20' rod.
