iPhone XR boxes with an "Assembled in India" tag were seen on Monday in many of the country's electronic product retailers, including Croma, with a price tag of Rs. 49,900 for the 64 GB version.
Earlier this year Reuters had reported that the company would assemble its top-end iPhones in India.
Apple did not immediately respond to a request for comment.
Prime Minister Narendra Modi's government has tried to position South Asia's third-biggest economy as a hub for smartphone manufacturing.
Companies such as Apple are also looking to use India as an export hub to soften the impact of an ongoing trade war between the United States and China.
© Thomson Reuters 2019