| Mammoth Cave Saltpeter Works,Mammoth Cave,Edmonson County,Ky,Kentucky,Habs | | EUR 9.18 | EUR 7.34 | | US | 3d 5h 10m |
| Mammoth Cave Saltpeter Works,Mammoth Cave,Edmonson County,Ky,Kentucky,Habs,5 | | EUR 9.18 | EUR 7.34 | | US | 3d 5h 10m |
| Mammoth Cave Saltpeter Works,Mammoth Cave,Edmonson County,Ky,Kentucky,Habs,7 | | EUR 9.18 | EUR 7.34 | | US | 3d 5h 10m |
| Mammoth Cave Saltpeter Works,Mammoth Cave,Edmonson County,Ky,Kentucky,Habs,13 | | EUR 9.18 | EUR 7.34 | | US | 3d 5h 10m |
| Mammoth Cave Saltpeter Works,Mammoth Cave,Edmonson County,Ky,Kentucky,Habs,15 | | EUR 9.18 | EUR 7.34 | | US | 3d 5h 10m |
| Mammoth Cave Saltpeter Works,Mammoth Cave,Edmonson County,Ky,Kentucky,Habs,31 | | EUR 9.18 | EUR 7.34 | | US | 3d 5h 10m |
| Mammoth Cave Saltpeter Works,Mammoth Cave,Edmonson County,Ky,Kentucky,Habs,20 | | EUR 9.18 | EUR 7.34 | | US | 3d 5h 10m |
| Mammoth Cave Saltpeter Works,Mammoth Cave,Edmonson County,Ky,Kentucky,Habs,25 | | EUR 9.18 | EUR 7.34 | | US | 3d 5h 10m |
| Mammoth Cave Saltpeter Works,Mammoth Cave,Edmonson County,Ky,Kentucky,Habs,8 | | EUR 9.18 | EUR 7.34 | | US | 3d 5h 10m |
| Mammoth Cave Saltpeter Works,Mammoth Cave,Edmonson County,Ky,Kentucky,Habs,12 | | EUR 9.18 | EUR 7.34 | | US | 3d 5h 10m |
| Mammoth Cave Saltpeter Works,Mammoth Cave,Edmonson County,Ky,Kentucky,Habs,28 | | EUR 9.18 | EUR 7.34 | | US | 3d 5h 10m |
| Postcard Saltpeter Cave Waterfalls Montserrat | | EUR 9.18 | EUR 18.31 | | US | 3d 10h 17m |
| Saltpeter Saltpetre Leaching Vats In Mammoth Cave Park, Kentucky Postcard Unused | | EUR 5.51 | EUR 17.17 | | US | 3d 15h 28m |
| Old 8X6 Historic Photo Of Saltpeter West Virginia The Railroad Station C1930 | | EUR 5.50 | EUR 0.61 | | AU | 4d 7h 12m |
| Instruction Sur L'existence Du Salpêtre Dans Les Terres Des Souterrains - 1794 | | EUR 46.00 | EUR 5.00 | | FR | 4d 8h 9m |
| Chromo Chocolat Poulain 1900-1905 Ecole Bon-Point Le Salpetre | | EUR 1.49 | EUR 6.00 | | FR | 4d 8h 33m |
| Chile Scrip Nitrate Bill Oficina Sacramento 5 Pesos 1920S Saltpeter Salitre Vale | | EUR 17.42 | EUR 3.63 | | MX | 4d 10h 37m |
| Eje Historic Magic Lantern Glass Slide Large Saltpeter Oven Pictured | | EUR 6.48 | EUR 21.09 | | US | 4d 15h 32m |
| 1934 Postcard - Saltpeter Cave, Natural Bridge, Virginia | | EUR 4.55 | EUR 18.52 | | US | 4d 15h 34m |
| Vintage Pennant Natural Bridge Va Virginia Saltpeter Cave Hotel Lace Waterfalls | | EUR 12.58 | EUR 23.08 | | US | 4d 22h 0m |