All Walking Liberty Half dollars from 1940 to 1947 with or without a mintmark, in average circulated condition (below EF-40 Grade) have the same retail values of $14.00. These years are high mintage, widely circulated coins, so most show heavy wear. The coins are very common.
The 1946 Walking Liberty half is common and most coins are valued at $12.00-$15.00.
A slabbed 1946 Walking Liberty half dollar has a current average retail value of $138.00 in MS-65
5-9-11>>> Coins of this series (Walking Liberty) dated from 1940 to 1946 are all very common and have the same retail values of $18.00 in average condition.
No one dollar coins were made in 1946. The coin is a 1946 Walking Liberty Half Dolllar that is very common and most are valued at $7.00-$9.00
4-23-11>> 1946 is a not a rare date for walking Liberty halves, if it shows any wear the value is for the silver, about $15.00
All Walking Liberty Half dollars in average circulated condition regardless of mintmark from 1940 to 1945 and the 1946 Philadelphia issue are valued the same at $7.00-$9.00 this covers the grade range of G-4 to EF-45.
The 1946 walking liberty half is a common date, but because it is 90% silver, it is worth around $10.50 in common circulated condition.
5-8-11>>> Coins of this series (Walking Liberty) dated from 1940 to 1946 are all very common and have the same retail values of $18.00 in average condition.
The word Liberty is on all US 1 cent coins and the date 1946 is so common the value is 2 to 3 cents
The 1946 Walking Liberty Half dollar is a very common high mintage coin, most show heavy wear with a average retail value of $14.00 in circulated condition.
Please turn the coin over and check the denomination on the back. It's a half dollar, not a dollar. There's more information at the question "What is the value of a 1946 US half dollar?"
The US has never made a gold half dollar of any date, it's likely been gold plated take it to a coin dealer for an idea of value.