I looked at my latest catalog and KM # 115 has the same design as KM 91a not only the coin is Aluminum
not Silver. This may be the same design as KM # 84 the picture nor description was good enough to
tell
It appears to me that some one has an incorrect image for KM # 115
Here is the 2013 world coin catalog entry for KM #91a and KM # 115
and the image with them
Sorry image is too small to see welll
KM# 91a 5 CENTS
4.3500 g., 0.9250 Silver 0.1294 oz. ASW Obv: National arms
within wreath, date below Rev: Fork-tailed flycatchers,
denomination above
Date Mintage
1984FM (P) — Value: 14.00
1985 Proof 212 Value: 16.00
KM # 115 5 Cents
1.0500g, Aluminum 20.2 mm
Date Mintage F VF XF Unc BU
1992 — — — 0.10 0.20 0.40
1993 — — — 0.10 0.20 0.40
1994 — — — 0.10 0.20 0.40
2000 — — — 0.10 0.20 0.40
Hope this helps