Solomon no Kagi for Famicom was released on July 30, 1986 in Japan. Retail price: 4900 Yen.
The original arcade game and the Famicom port are fairly similar. The chambers are (for the most part) the same but the Famicom version arguably features more of them (well, although the arcade game consists of fifty one chambers, five of them are generic bonus levels so, technically, the Famicom version feature more original levels). The console port also feels easier and the player is allowed more time to complete each chamber. Some bonus items and secrets are different (the arcade version has different keys that lead to hidden bonus stages for instance), and the arcade version has slightly more enemies (such as colored slimes).
[US] "Solomon's Key [Model NES-KE-USA]
[EU] "Solomon's Key [Model NES-KE-EEC]