Fred inspired me to go grab my thinking cap and try to crack Heddon's code, so I reshuffled this list from another thread into numerical order.

It is obvious that the R/L reels were in a series, so I highlighted those in red font.

The "top of the line" series has been highlighted in green.

I thought maybe I was onto something else when I compared my 233 with its bigger brother, the 277.

Was thinking maybe a 2 followed by a double number (222, 233, 244, 255, 266, 277) might be a series. Nope, I can't find any proof there is such a thing as the 244 or 255. And the 222 is a larger reel than the 233.

Then I looked into the Heddon 1971 online catalog and cleared up some things. The 233, 248, and 277 are part of a series I highlighted in blue font. The 212, 222, 238, and 266 seem to be a series according to 1971 catalog so I highlighted those in purple.

204 appears to be the one of the smallest, line capacity is 80 yd 6 lb mono, reel weighs 7 oz

205 L/R has line capacity of 200 yd 8 lb mono, weight 12.5 oz

210 L/R 200 yds 15 lb mono weight 17 oz **212 has line capacity of 200 yd 15 lb mono, weight 15 oz**215 has line capacity of 175 yd 6 lb mono, weighs 6 oz, external hammer type bail closure

220 L/R has approx line capacity 200 yd 8 lb mono weight 12 oz **222 has line capacity of 200 yd 8 lb mono, weighs 12 oz**230 has line capacity of 200 yd of 10 lb test, weighs 12.5 oz

233 has line capacity of 200 yds 6 lb test weighs 9 oz234 convertible, has line capacity of 200 yds 6 lb test weighs 9 oz235 line capacity of 200 yd 6 lb test, weighs 7 oz, external hammer type bail closure

236 has line capacity of 200 yd 6 lb test, weighs 7 oz, external hammer type bail closure

**238 has line capacity of 200 yd 6 lb test, weighs 10 oz**242 large size, weighs 24 oz

245 medium size, weighs 13 oz

246 medium size, weighs 13.3 oz convertible248 has line capacity of 200 yds 10 lb test weighs 13 oz251 is a large reel designed for lake trout, salmon and muskie, convertible252 no info on size, convertible

260 L/R has line capacity of 200 yd 15 lb mono, weighs 18.3 oz**266 has line capacity of 200 yd 25 lb test weighs 18 oz**

270 L/R Ocean Spinning Reel.. Holds 200 yds 25-lb test mono....Weighs 20 oz277 has line capacity of 200 yds 15 lb test weighs 18 oz280 med

281 has line capacity of 100 yds 6 lb test weighs 9 oz

282 has line capacity of 200 yd 8 lb test, weighs 13-1/2 oz

283 has line capacity of 200 yd 15 lb test weighs 16 oz

284 has line capacity of 200 yd 20 lb test weighs 18 oz290 med

295 heavy salt

EDIT: I grouped the 238 with the 212, 222, and the 266. In the 1972 catalog, the 238 is listed as weighing 2 oz less than the 222.

EDIT: Added the Heddon 235

EDIT: Added specs on 220-R