Actually I don't know what the model nickname is as I'm purchasing it from Amazon.in and no information about it is provided in the description. I'm attaching the link to the web-page, hoping it will be of some help for you to determine the model.
https://www.amazon.in/gp/product/B01...k_ql_qh_dp_hza. It is a grey-scale 2016 Kindle Basic E-reader.