- 301 2nd Ave, Keystone, IA 52249
- 6880 17th Avenue, Keystone, IA 52249
- 209 2nd Avenue, Keystone, IA 52249
- 203 3rd Avenue, Keystone, IA 52249
- 409 1st Avenue, Keystone, IA 52249
- Lot 11 W Franzenburg Addition, Keystone, IA 52249
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