Glasbake Clear Glass Oval Casserole with Hobnail Bubble Bottom and Ribbed Knob Lid, Marked 78
This is a Glasbake clear glass oval casserole with its lid. The dish is a deep oval with small tab handles at each end and a floor textured with rows of raised bubbles (a hobnail-style pebble pattern) around a smooth oval panel. In that panel Glasbake is molded in script inside a cushion-shaped frame, with 78 below and faint lettering around it. A band of fine concentric ribs circles the solid clear mushroom knob on the domed oval lid. Glasbake ovenware was made by McKee Glass from about 1917 to 1961 and by Jeannette until 1983.
Help identify this item
We could not identify this piece. If you know the maker, the name, the year or where it came from, please tell us below. Photos of a marked copy help most.
Glasbake ovenware
Glasbake was heat-resistant glass ovenware made by McKee Glass Company in Jeannette, Pennsylvania, under license from Corning. Accounts date the line's start to 1917 or 1921; it continued under the McKee Division of Thatcher Glass until 1961, and Jeannette Glass sold it as Glasbake from 1961 to 1983.
Clear oval baker with a bubbled floor and knob lid
The Glasbake clear oval casserole is a deep oval baking dish in clear, colorless heat-resistant glass with a matching domed lid. Smooth, gently flared sides rise to a flat rolled rim, with a small flat tab at each end of the oval to grip it by. As is usual in pressed ovenware, the clear glass has a faint gray-green tint at the thick edges.
The lid is a shallow oval dome with a flat flange that rests on the dish rim. In the middle is a raised round collar circled by a band of fine concentric ribs, and from it rises a solid clear knob shaped like a short mushroom, with a slightly hollowed top. Most distinctive of all is the inside floor of the dish: a large oval field of raised, closely packed bubbles or hobnail bumps in rows, with a smooth oval panel in the center.
The mark is molded in that center panel and reads through the glass from inside or below: Glasbake in a rounded handwritten-style script with a long underline-like frame, set inside a cushion or pillow-shaped outline. Below it is the number 78. Small raised characters run around the panel above and below; a 2 and an S are visible, and the lower line appears to read U.S.A., but most of these are too faint to read with certainty in the photos.
On this copy: the dish measures about 9 3/4 inches long from tab to tab on the tape measure. Both pieces look clean and clear, with no chips or cracks seen; there are light water spots and a little grime in the bubbled texture.
- Form: Deep oval casserole with end tabs and domed lid
- Material: Clear pressed heat-resistant ovenware glass
- Colors: Clear, colorless with a faint gray-green tint at thick edges
- Floor: Hobnail-style raised bubble texture around a smooth oval panel
- Lid: Domed oval with a ring of fine concentric ribs and a solid clear mushroom knob
- Mark: Glasbake in script inside a cushion-shaped frame, 78 below, faint lettering around
- Maker: Glasbake (McKee Glass, later Jeannette)
- This copy: About 9 3/4 inches long tab to tab; no chips or cracks seen; light water spots
Dish floor (molded): Glasbake 78 (faint lettering around the panel, partly legible; lower line appears to read U.S.A.)
- Glasbake clear oval casserole with lid
- Glasbake 78 casserole
- Glasbake oval baker hobnail bottom
- vintage clear glass oval casserole with bubble bottom
- clear glass casserole with bumpy textured bottom and knob lid
- Glasbake clear glass baking dish with ribbed lid
- McKee Glasbake clear ovenware oval
- Glasbake replacement lid oval clear knob
- what does 78 mean on Glasbake
- how old is my clear Glasbake casserole
- who made Glasbake glass
- is Glasbake the same as Pyrex
- clear oval dish marked Glasbake in script on the bottom
No comparable listings found yet
Live listings on ebay.com, checked October 2026. Asking prices, not sold prices.
We have not found another one listed on eBay or Etsy yet. If you have seen one, tell us where.
About the Glasbake Clear Oval Casserole with Lid
What does the 78 on the bottom of my Glasbake dish mean?
It is a molded number, most likely the mold or shape number. No source was found that ties 78 to a year or a size.
Who made Glasbake, and is it the same as Pyrex?
Glasbake was made by McKee Glass, licensed by Corning, and later by Jeannette Glass. It is a different brand from Corning's Pyrex, though both are heat-resistant ovenware.
How old is a clear Glasbake casserole?
Glasbake was made from about 1917 until 1983. This dish has no date mark, so it can only be placed in that span.