By the mid 1960's the
Canada Post Office Department was
interested in having more variety in the stamp program
and to give their current long term security printer
the Canadian Bank Note Co, some competition.
More colourful stamps, different print techniques,
innovative booklet formats for easier dispensing, etc etc.
Therefore when the
British American Bank Note Co approached
Canada Post it received a contract to produce as of 1968
- the first class definitives in sheets of 100
- medium and high value definitives
- stamp booklets
- aerogrammes in 2 colour photogravure
- and the opportunity to quote on all commemoratives.
To fulfill this contract
BABN bought a
Goebel BRNST-50 webfed,rotary press which was capable of printing
3 colour recess engraving (using 1 cylinder) and
4 photogravure cylinders.
The Goebel press used a double platen system to perforate
the sheets.
Initially they used a perf 10 spacing but because
of complaints of separation problems within less than a year
the perforations were changed to 12 X 12.5
At that time
Canada Post asked the printer for
panes to have straight edges on 3 sides.
This was supposed to eliminate all the selvadges
cluttering up the Post Office counters.
I guess the higher ups at
Canada Post hadn't
heard there is such a thing as a waste basket.
Within a couple of years the idea behind it
and the straight edges were gone.
The first stamp BABN produced on the Goebel was the Nonsuch
which was issued on June 5, 1968.
1 colour engraved and 3 colours photogravure.
Engraved by George Arthur Gundersen
It was the first Canadian stamp with comb perforation.
Quantity 24.5 million
Canada Scott 482 
Philatelic Plate Block

Straight edge Plate Block for Post Office field stock.

After a 20 year run printing hundreds of millions of stamps
BABN retired the press.
These booklet stamps were the last stamps printed by BABN
on the Goebel press.
3 colours engraving and 1 colour photogravure, the green bars at the top.
Engraved by Robert Couture
Canada Unitrade 1188a BK100 Jan 18, 1989
Most of the information here is from the article
The Goebel Press Era of Canadian Stamps in the Corgi - Times Jan-Feb 2010 issue, written by Ken Sargent with Leopold Beaudet.
Ken Sargent was president of BNAB until his retirement 1985.
I thank SCF member jogil for emailing me the article.