Thanks for the update - but I just realised the spelling of 'GOODDEN' in the subject line is also wrong.
The one listed on eBay is not the Goodden one. Chance probably stopped making these in the 1960s, or even earlier, so the date of 1980s (assuming it is correct) would not figure either. I suspect this one was made by Nazeing, but I agree it is similar to the Goodden style (a side view would be quite helpful!)