The reverse of the bicentennial Eisenhower dollar was designed by Dennis R. Williams, so those are his initials on the coin.
Please rephrase and post new question
They're the engraver's initials - Dennis R. Williams
It's the monogram of the designer, Dennis R. Williams. Also, remember that circulation issues of this coin are copper-nickel, not silver, so they're only worth face value. Special collectors' coins were struck in 40% silver and sold separately in sealed packages. They sell for $5 to $7.
"Dual Rear Wheel"
Duel Rear Wheels
The reverse was designed by Dennis R. Williams, those are his initials.
drw means dual rear wheels
Copper-nickel, not silver. DRW is not the mint mark. It's the monogram of Dennis R. Williams who designed the coin's reverse side. The mint mark, if present, is above the date. The Liberty Bell has had a crack in it for almost 2 centuries and it's its most famous feature so it's not at all surprising that the coin's designer would choose to show it. Now that all of that's out of the way, there were over 230 million of these coins made as part of the Bicentennial celebration. Unless yours is a proof or uncirculated coin, it's only worth face value to $1.15.
To clear things up: - Not gold, but gold-plated by a private company. - Not under the eagle, but under the bell. There's no eagle on a Bicentennial dollar. - Not a mint mark, but the designer's monogram (Dennis R. Williams) - Not printed but struck. That said, your coin is only worth face value unless it's one of the special 40% silver collectors' dollars minted in 1975 and 1976. All of these coins have an "S" mint mark above the dual dates, but because yours is plated it would have to be weighed on a sensitive scale to determine whether it's made of silver or cupronickel.
Don't know how big the trailer is but having DRW will improve handling.
I BELIEVE IT IS DUAL REAR WHEELS