Toronto, Ontario – April 27, 2017 – Excellon Resources Inc. (TSX:EXN and EXN.WT; OTC:EXLLF) (“Excellon” or the “Company”) is pleased to provide an update on the ongoing optimization program and announce first quarter 2017 production results from the Platosa Mine in Durango, Mexico. Highlights • Continued positive results from optimization program, with drawdown over past two weeks of 1.3 metres, higher than forecasted at current pumping rates • Five of 12 submersible pumps operating, with well-cleaning and pump installation ongoing and four additional submersibles to be installed in next two weeks • Primary booster station running at full capacity, with second booster pump station commissioned and ready to commence pumping this week • Q1 2017 Production (Compared to Q1 2016) o Silver equivalent (“AgEq”) production of 205,314 oz (Q1 2016 – 363,552 AgEq oz) o Silver production of 108,118 oz (Q1 2016 – 211,557 oz) o Lead production of 0.6 million lb (Q1 2016 – 1.3 million lb) o Zinc production of 0.9 million lb (Q1 2016 – 1.6 million lb) • Development completed during Q1 and continually drier mining conditions resulting in improved grades and productivity being realized in April as operations access main body of Rodilla manto