1st cameo appearance of Wolverine
2nd appearance of Wendigo
Marvel Value Stamp Series A #67 - Cyclops
⚠️ Debatable Firsts: this issue, by far, is the most debated "cameo versus full" book and likely the main reason "cameo" became such a significant yet loosely defined term in comic book collecting
Theoretically, The Incredible Hulk #180 being labeled "cameo" of Wolverine was due to an oversight by Overstreet (see additional images)
In the 1980/1981 edition of Overstreet, Hulk#181 is labeled - 1st app of Wolverine and Hulk#180 is without a descriptor, commanding the same value as issues #151 - #176
In the 1981/1982 Overstreet, the description had been amended to read #180 - 1st app. Wolverine but mislabeled #181 and #182 - Wolverine cameo
Finally, in 1982/1983, Overstreet labeled Hulk #180 - 1st app. Wolverine (cameo) and #181 - Wolverine app. #182 - Wolverine cameo
In recent years, Marvel has taken a stance on Hulk #180 as the first appearance of Wolverine, wanting to eliminate the term "cameo" altogether, presumably to avoid this exact debate
But in years past, official Marvel guidebooks and trading cards would often trade-off which issue was given the coveted 1st (full) appearance designation (see additional images)