The 027 1021. 7 and 3/8ths long
The Marx version I guess, with no ID. The same as the 1021.
The center rails are not connected.
The 027 1020 again 7 and 3/8ths long
The O scale 020 crossing at 8 3/8ths inches long.
An older version of the 020.
An 027 crossing I can't see the...