This ERROR coin appears to be a 1944-D Lincoln Wheat Cent with a broadstrike (partial collar) mint error. 

Broadstrike / Partial Collar Strike"Railroad Rim")

The coin has an expanded diameter with very wide, flat rims.

The reverse shows a partial collar effect, with raised, elongated rim sections around approximately the 3 and 9 o'clock positions.

The design is centered, but the edge appears to have spread outward during striking, which is characteristic of a coin struck without the collar fully restraining the planchet.

Both obverse and reverse display the same expanded appearance.

Date: 1944

Mint: Denver (D)

Composition: Bronze (95% copper, 5% tin and zinc)

Weight (should be): 3.11 grams but we weigh it a 2.8 grams

We are dipping into our hoard of error coins that we have put aside over the last 60 years of dealing with coins.