Don't look for bell bottoms, the Gong Show or Star Wars, it's not that 70's. Builder gid617 has built a fascinating timeline of the 1870's, with a fantastic history lesson to boot. Various points along the decade are called out, and a lovely little vignette illustrates that event. Click through for a little historical knowledge and some excellent little MOCs.
Note: I took the liberty of color correcting this image, hope you don't mind gid617