A lot of bike stuff is in the metric system, versus gauges or fractions of inches
For a general discussion about old bicycles, perhaps 0.150 was a typo for 0.105 or 0.120?
My old Bendix hubs (marked 36-13) had 36 each 13 gauge holes (0.09" or 2.3 mm) for 14 gauge spokes (0.080 or 2.0 mm), for a difference of 0.3 mm or 0.01 inches; (seems small but that's 15%). Old Bendix catalogs also show hubs for spoke sizes 0.105" (12 gauge or 2.6 mm) and 0.120" (10 gauge or 3.05 mm). Thinner steel flanges on hubs might allow smaller clearances for the spoke elbow to make the turn while being inserted thru the hole.
Maybe the stock ~0.103 (12 gauge or 2.6 mm) holes could have been for 13 gauge spokes (2.3 mm or 0.90 inch).
Maybe the 0.142" holes (3.6 mm or 9 gauge) could have been for 10 gauge spokes (3.2 mm or 0.124 inch).
Worksman industrial bikes may use another 10 gauge (0.120" or 3.05 mm) spokes; sometimes I confuse the 12 gauge with the 0.12 inch.
Husky industrial bikes may use 11 gauge spokes (2.9 mm). Generally, old bicycles did not use too many oversize motorcycle parts.
For motorcycles, I believe the spoke standards may be different, in the 8 and 9 gauge sizes (0.150 inch).
