This image released by Metropolis Collectibles shows the June, 1938 cover of Action Comics. (AP)

The Man of Steel is up for auction, and Wednesday night’s winning bid could be a record north of $1.5-million.

A rare 1938 Superman comic book was put on the block Nov. 11, and with less than 20 hours to go, the auction/consignment site ComicConnect.com and its sister dealership, Metropolis Collectibles, expect the book — Action Comics No.-1 — to fetch a record prize. (As of 12:01 a.m. Wednesday, the top posted bid — though not yet officially authenticated, of course — was $1.552-million.)

The record bid for a comic book at auction is $1.5-million, set in 2010 — also for an issue of Action Comics No.-1. This June 1938 book — which features the debut of Siegel and Shuster’s Superman — was reportedly found early this year in a California storage shed. And according to the book’s lore, it was once owned — and stolen from — actor and Super-fan Nicolas Cage.

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[Rare Superman on the auction block]

The issue at auction is graded at “9.0” — or near-mint condition. There are estimated to be about 100 extant copies of the comic, few in good condition.

In 2010, there was a spasm of big-spending on Action Comics No.-1and Detective Comics No.-27 (Batman’s debut), with the ping-ponging record escalating to $1.5-million.

Metropolis Collectibles says the current “9.0” issue has twice before been the most valuable comic book: It set records when it sold in 1992 (for $86,000) and again in 1997 ($150,000), according to the AP.