| Image2 | |
| Cat Number | 171a |
| Description | Koala |
| Denomination | 4p |
| Perforation | |
| Date Issued | 2038-01-01 |
| Variety | Perf 13.5x14 |
| Series | |
| Color | green |
| Year | 1938 |
| Type | Definitive |
| Image1 | |
| Ebaylink | https://www.ebay.com/sch/i.html?_from=R40&_nkw=Australia+stamp+171a&_sacat=0&rt=nc&LH_Sold=1&LH_Complete=188 |
| ID | 188 |
| Sorter | 188 |