Investors and consumers will finally get a look at Apple Inc.'s  (AAPL) - Get Report iPhone X on Tuesday, Sept. 12, after months of speculation. As CEO Tim Cook takes the stage for the tech giant's event starting at 1 p.m. ET, there are a few stocks to watch that aren't Apple.

There's no way to know a full list of parts suppliers for the new device until a teardown is performed, Bloomberg reported. But some supply chain companies seem to be sure shots in the iPhone X.

In the U.S., stocks to watch include suppliers Skyworks Solutions Inc. (SWKS) - Get Report , Broadcom Ltd. (AVGO) - Get Report , Cirrus Logic Inc. (CRUS) - Get Report and Analog Devices Inc. (ADI) - Get Report . Inductive and wireless charging pioneer Energous Corp. (WATT) - Get Report could see a boom as the new iPhone is said to have wireless charging capabilities.

It's also worth keeping an eye on competitors for Apple's new Watch. Garmin Ltd. (GRMN) - Get Report , Fossil Group Inc. (FOSL) - Get Report , Swatch Group AG (SWGAY) and Fitbit Inc. (FIT) - Get Report could seek to compete for market share in a growing smart watch landscape.

In Asia, iPhone assemblers Hon Hai Precision (HNHAF) and Pegatron Corp. (PGTRF) and Apple watch assembler Quanta Computer (QUCCF) are worth watching.

Other Asian-listed shares that could see a boom with increased iPhone and Apple Watch sales include Japan-listed Sharp Corp. Ltd. (SHCAY) , TDK Corp. (TTDKY) , Kyocera Corp. (KYOCF) , Sony Corp. (SNEJF)  , Alps Electric Co. (APELF) and Taiyo Yuden Ltd. (TYOYF) ; and South Korea-listed Samsung Electronics (SSNLF) .

Taiwanese suppliers Hon Hai, Taiwan Semiconductor Manufacturing Co. (TSM) - Get Report , Largan Precision Co. and Catcher Technology Ltd. (CHERF) are largely credited with pushing the country's stock market to its highest levels since 1990. Hong Kong's AAC (AACAY) is the second-best performing stock on the country's Hang Seng Index in the last six months, up 70% in that period.

In Europe, Dialog Semiconductor (DLGNF) , AMS (AMSYF) , Infineon (IFNNF) , STMicroelectronics (STMEF) and IQE PLC  (IQEPF) are on the list to watch. AMS and IQE have both surged already on reports their parts are in the new iPhone. Dialog hasn't fared as well, falling as Apple is said to seek more in-house capabilities to make the chips Dialog manufactures.

Apple and Broadcom are holdings in Jim Cramer's Action Alerts PLUS Charitable Trust Portfolio. Want to be alerted before Cramer buys or sells AAPL and AVGO? Learn more now.

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