Aztec Gold - アズテックゴールド [import, 1982] by KW Systems & シグマ (Sigma)

Name: Aztec Gold - アズテックゴールド
Year: made 1982, imported 1984
Company: KW Systems & シグマ (Sigma)

Aztec Gold is a 4-player coin pusher that premiered at the 1982 ATE show.

Leisure Play Vol 3 #2

You can see a tiny glimpse of it in the far right of this photograph when Sigma brought it in to Japan:

Game Machine 1984-10-15

1980 Magic Toppers - マジック・トパース by シグマ (Sigma)

Name: Magic Toppers - マジック・トパース
Year: 1980
Company: シグマ (Sigma)

In 1980, Sigma released their own version of Magic Toppers, a 10-player mass medal machine.

There is a version that I believe came out in the late 1960s, made by Crompton, that was imported into Japan around 1973 by ジャパンオーバーシーズビジネス (Japan Overseas Business).
Then a redone version by Crompton was imported around 1975 by エスコ貿易 (Esco Trading).

This version of Magic Toppers first appears in Game Machine magazine in 1981:

1981-03-01

1981-03-15

A Sigma company publication puts the year for Magic Toppers as 1980, so perhaps it was first made then, and more widely released in 1981?  Since it's a company publication, there's also a chance they just noted what their internal date was, i.e. when the project began.

私と・シグマと・25年

Sigma exported the machine to the USA.  I have not yet seen any photos of Magic Toppers in a North American arcade.

Cash Box 1981-05-16

Cash Box 1981-05-16
(continued)

Cash Box 1981-07-04