Circa 1913-14 - Earliest example of 600 (single) and 601 (double) streetlamp with rounded arch brackets. 

Circa 1915-1922 - Middle period 600 (left) and 601 (right) with squared arch brackets.

Circa 1920 - As you can see from the original box some of these lights were sold in sets of three.

Circa 1923-1927 - Last variation of 600 (left & right) and 601 (middle) with fluted shades.

Fluted 601 above and 600 below.

Circa 1922-1930 - No. 306 (top) and 307 (bottom) streetlamps.

Circa 1928-30 - Late No. 307, mint in the box.

Above is a 306 (left) and 307 (right) in the later mottled gray color.

Fluted top of No. 306.

Circa 1928-1929 - Streetlamps No. 307 (left) and No. 308 (right). No. 308 was not cataloged until 1928 - mottled gray color usually indicative of 1928-1929. This light was also cataloged as an 1882 (31-32)

Base and top from late No. 307

Circa 1929-30 - No. 308 street light mint in box.

Another No. 308 streetlight in an unusual Cadet Blue color.

The same as a Lionel No. 54, when sold by IVES it was just rubber stamped 1905. With original box below.